CIP: Oni^Sif, Dark Maul -> Manifold Assault or Platinum Paragon?

I’ve got this character

 Dungeon Crawl Stone Soup version 0.35-a0-546-gb2ce4df294 (webtiles) character file.

petercordia the Slayer (Oni Conjurer)             Turns: 110021, Time: 06:53:43

Health: 297/297    AC: 20    Str: 18    XL:     24   Next: 10%
Magic:  46/46      EV:  8    Int: 36    God:    Sif Muna [*****.]
Gold:   2566       SH:  0    Dex:  5    Spells: 2/61 levels left

rFire   + . .  (50%)    b - +5 glaive "Ephit" {vamp, Will+ Int+4}
rCold   . . .  (100%)     [offhand occupied]
rNeg    + . .  (50%)    V - +7 swamp dragon scales
rPois   +      (33%)    d - +2 hat of the Cartwright {Harm rF+ rN+ MP+5}
rElec   +      (33%)    e - +0 cloak
rCorr   .      (100%)   o - amulet of faith
SInv    +               v - ring of Qitesen {Wiz Int+5}
Will    +++++           h - ring "Siumuhuh" {+Blink rElec Will+++ Dex-2 SInv}
Stlth   +++       
HPRegen 0.69/turn
MPRegen 0.30/turn

%: harm (+30% outgoing, +20% incoming), faith, wizardry (x1)
@: studying 3 skills
A: large, unfitting armour, horns 1, tough skin 1, double potion healing,
drunken brawling, low MP 1, robust 1, wild magic 1
}: 3/15 runes: decaying, serpentine, slimy
a: Imbue Servitor (0%), Imprint Weapon (0%), Renounce Religion (0%), Evoke Blink
(28%), Channel Magic (0%), Forget Spell (0%), Divine Exegesis (3%)


You are on level 2 of the Depths.
You worship Sif Muna.
Sif Muna is extremely pleased with you.
You have visited 10 branches of the dungeon, and seen 45 of its levels.
You have visited 1 bazaar.
You have also visited: Trove, Sewer, Gauntlet and Wizlab.

You have collected 5890 gold pieces.
You have spent 3324 gold pieces at shops.

Inventory:

Hand Weapons
 a - the +10 dark maul {heavy}
   (You took it off a deep elf annihilator on level 3 of the Elven Halls)   
   
   It cannot be enchanted further.
 b - the +5 glaive "Ephit" (weapon) {vamp, Will+ Int+4}
   (You took it off an ancient champion in a wizard's laboratory)   
   
   Will+:     It increases your willpower.
   Int+4:     It affects your intelligence (+4).
   
   It cannot be enchanted further.
 j - a +5 mace of chaos
Missiles
 k - 3 darts of disjunction
 l - 38 poisoned darts (quivered)
 m - 2 silver javelins
 s - 20 boomerangs
 u - 5 curare-tipped darts
 T - 6 atropa-tipped darts
Armour
 d - the +2 hat of the Cartwright (worn) {Harm rF+ rN+ MP+5}
   (You found it in a treasure trove)   
   
   Harm:      It increases damage dealt and taken.
   rF+:       It protects you from fire.
   rN+:       It protects you from negative energy.
   MP+5:      It affects your magic capacity (+5).
   
   It cannot be enchanted further.
 e - a +0 cloak (worn)
 f - a +0 kite shield of protection
 p - a +2 hat
 q - the scarf of Music {Shadows, rElec rPois}
   (You found it on level 4 of the Vaults)   
   
   rElec:     It insulates you from electricity.
   rPois:     It protects you from poison.
 r - a +2 robe of willpower
 V - +7 swamp dragon scales (worn)
 W - an orb of energy
Magical Staves
 i - the earth staff "Beetlebane" {^Drain +Blink rF+ SInv Earth}
   (You found it in a Gauntlet)   
   
   [staff of earth]
   
   ^Drain:    It drains your maximum health when unequipped.
   +Blink:    It lets you blink.
   rF+:       It protects you from fire.
   SInv:      It lets you see invisible.
   Earth:     It increases the power of your Earth spells.
 n - the air staff "Ymmuit" {rElec MP+5 SInv Necro Air}
   (You took it off a minotaur in a Gauntlet)   
   
   [staff of air]
   
   rElec:     It insulates you from electricity.
   MP+5:      It affects your magic capacity (+5).
   SInv:      It lets you see invisible.
   Necro:     It increases the power of your Necromancy spells.
   Air:       It increases the power of your Air spells.
 K - the cold staff of Rikiyru {rF+ rC+ Dex+4 Ice Air Alch}
   (You found it on level 5 of the Pits of Slime)   
   
   [staff of cold]
   
   rF+:       It protects you from fire.
   rC+:       It protects you from cold.
   Dex+4:     It affects your dexterity (+4).
   Ice:       It increases the power of your Ice spells.
   Air:       It increases the power of your Air spells.
   Alch:      It increases the power of your Alchemy spells.
 Z - a staff of conjuration
Jewellery
 c - an amulet of guardian spirit
 h - the ring "Siumuhuh" (worn) {+Blink rElec Will+++ Dex-2 SInv}
   (You found it in a Gauntlet)   
   
   [ring of see invisible]
   
   +Blink:    It lets you blink.
   rElec:     It insulates you from electricity.
   Will+++:   It greatly increases your willpower.
   Dex-2:     It affects your dexterity (-2).
   SInv:      It lets you see invisible.
 o - an amulet of faith (worn)
 t - the ring "Qesam" {rC++ Wiz Int+2 Dex-3}
   (You found it on level 1 of the Snake Pit)   
   
   [ring of wizardry]
   
   rC++:      It greatly protects you from cold.
   Wiz:       It increases the success rate of your magical spells.
   Int+2:     It affects your intelligence (+2).
   Dex-3:     It affects your dexterity (-3).
 v - the ring of Qitesen (worn) {Wiz Int+5}
   (You found it in a treasure trove)   
   
   [ring of wizardry]
   
   Wiz:       It increases the success rate of your magical spells.
   Int+5:     It affects your intelligence (+5).
 w - a ring of flight
 x - the ring "Bepotoi" {Str+2 SInv Stlth+}
   (You found it in a treasure trove)   
   
   [ring of see invisible]
   
   Str+2:     It affects your strength (+2).
   SInv:      It lets you see invisible.
   Stlth+:    It makes you more stealthy.
 y - the ring of the Tempest {rCorr Int+4}
   (You found it in a treasure trove)   
   
   [ring of obsoleteness]
   
   rCorr:     It protects you from acid and corrosion.
   Int+4:     It affects your intelligence (+4).
 z - the ring of Dekeonwe {rF+ Str+9 Stlth+}
   (You found it in a treasure trove)   
   
   [ring of strength]
   
   rF+:       It protects you from fire.
   Str+9:     It affects your strength (+9).
   Stlth+:    It makes you more stealthy.
 A - a +4 ring of slaying
 B - a ring of see invisible
 C - a ring of protection from cold
 D - a +4 ring of protection
 E - a +6 ring of dexterity
 F - a +6 ring of strength
 G - a ring of positive energy
 H - a ring of protection from fire
 I - a ring of resist corrosion
 J - a ring of willpower
 L - a ring of poison resistance
 M - the ring "Nosho" {rF+ rN+ Will++ AC+4 Str-3}
   (You bought it in a shop in a bazaar)   
   
   [ring of protection]
   
   rF+:       It protects you from fire.
   rN+:       It protects you from negative energy.
   Will++:    It greatly increases your willpower.
   AC+4:      It affects your AC (+4).
   Str-3:     It affects your strength (-3).
 N - an amulet of reflection
 O - the ring "Faohugot" {Will+ MP+4 Str+2 Slay+4 Stlth-}
   (You took it off a deep elf elementalist on level 3 of the Elven Halls)   
   
   [ring of slaying]
   
   Will+:     It increases your willpower.
   MP+4:      It affects your magic capacity (+4).
   Str+2:     It affects your strength (+2).
   Slay+4:    It affects your accuracy & damage with ranged weapons and melee
   (+4).
   Stlth-:    It makes you less stealthy.
 P - a +5 ring of evasion
 Q - a ring of magical power
 R - the ring of Shadows {Umbra +Inv Stlth+}
   (You took it off a deep elf sorcerer on level 3 of the Elven Halls)   
   
   [ring of stealth]
   
   Umbra:     It surrounds you with an aura of shadow, increasing your stealth
   and
              reducing the accuracy of all others within it.
   +Inv:      It lets you turn invisible.
   Stlth+:    It makes you more stealthy.
 S - a +5 ring of evasion
 U - an amulet of regeneration
 Y - a ring of protection from cold
Talismans
 g - the hive talisman of Poakh {rCorr Int-5 Dex+6}
   (You found it in a treasure trove)   
   
   [hive talisman]
   rCorr:     It protects you from acid and corrosion.
   Int-5:     It affects your intelligence (-5).
   Dex+6:     It affects your dexterity (+6).
 X - a sanguine talisman
Wands
 a - a wand of digging (15)
 r - a wand of flame (60)
 z - a wand of paralysis (46)
 G - a wand of light (16)
 N - a wand of roots (40)
 Y - a wand of polymorph (21)
 f - a wand of mindburst (10)
Scrolls
 h - 6 scrolls of blinking
 c - 2 scrolls of torment
 m - 6 scrolls of enchant weapon
 t - 3 scrolls of fear
 i - 23 scrolls of identify
 B - 13 scrolls of teleportation
 d - 2 scrolls of brand weapon
 F - 5 scrolls of immolation
 H - a scroll of poison
 K - 3 scrolls of silence
 M - 15 scrolls of noise
 O - 6 scrolls of fog
 W - 7 scrolls of vulnerability
 A - a scroll of acquirement
 x - a scroll of amnesia
 a - a scroll of enchant armour
Potions
 b - 4 potions of magic
 c - 9 potions of brilliance
 i - 5 potions of invisibility
 n - 9 potions of enlightenment
 p - 22 potions of curing
 u - 9 potions of heal wounds
 v - 8 potions of berserk rage
 w - 11 potions of haste
 A - 8 potions of attraction
 M - 6 potions of mutation
 J - 7 potions of lignification
 C - 2 potions of cancellation
 m - 7 potions of might
 r - a potion of resistance
 a - 6 potions of ambrosia
Miscellaneous
 R - a +2 box of beasts
 g - a +0 condenser vane
 h - a +1 lightning rod (4/4)
 i - a +0 phantom mirror
Baubles
 Q - 5 flux baubles


   Skills:
 - Level 21.0 Fighting
 + Level 4.1 Maces & Flails
 - Level 6.0 Armour
 - Level 8.0 Dodging
 - Level 8.0 Stealth
 - Level 19.0 Spellcasting
 - Level 14.0 Conjurations
 - Level 14.0 Translocations
 - Level 14.0 Forgecraft
 - Level 8.0 Fire Magic
 - Level 14.0 Ice Magic
 - Level 4.0 Earth Magic
 - Level 8.0 Alchemy
 - Level 14.0 Invocations


You have 2 spell levels left.
You know the following spells:

 Your Spells              Type           Power      Damage    Failure   Level
a - Orb of Destruction    Conj           54%        9d14      2%          7
b - Spellspark Servitor   Conj/Frge      54%        N/A       2%          7
c - Iskenderun's Mystic   Conj/Tloc      100%       2d19 (+2d11%          4
d - Splinterfrost Shell   Ice/Frge       54%        6d18      2%          7
e - Diamond Sawblades     Frge           54%        4d10      2%          7
f - Fireball              Conj/Fire      49%        3d19      1%          5
g - Brom's Barrelling Bo  Conj/Erth      91%        2d13      1%          4
m - Manifold Assault      Tloc           54%        N/A       2%          7
p - Passage of Golubria   Tloc           100%       N/A       1%          4
r - Ozocubu's Refrigerat  Ice            54%        4d19      2%          7

Your spell library contains the following spells:

 Spells                   Type           Power      Damage    Failure   Level
 Apportation              Tloc           100%       N/A       1%          1
 Foxfire                  Conj/Fire      100%       2x1d9     1%          1
 Freeze                   Ice            100%       1d10      1%          1
 Kiss of Death            Conj/Necr      100%       2d13      1%          1
 Magic Dart               Conj           100%       1d8       1%          1
 Poisonous Vapours        Alch/Air       100%       1d4       1%          1
 Sandblast                Erth           100%       2d20      1%          1
 Shock                    Conj/Air       100%       1d9       1%          1
 Slow                     Hex            100%       N/A       1%          1
 Soul Splinter            Necr           100%       N/A       1%          1
 Summon Small Mammal      Summ           100%       N/A       1%          1
 Blink                    Tloc           100%       N/A       1%          2
 Call Imp                 Summ           88%        N/A       1%          2
 Ensorcelled Hibernation  Hex/Ice        100%       N/A       1%          2
 Grave Claw               Necr           88%        2d13      1%          2
 Mercury Arrow            Conj/Alch      100%       2d11      1%          2
 Momentum Strike          Conj/Tloc      100%       3d10      1%          2
 Scorch                   Fire           100%       2d9       1%          2
 Searing Ray              Conj           100%       2d8       1%          2
 Sublimation of Blood     Necr           44%        N/A       1%          2
 Frozen Ramparts          Ice            100%       1d16      1%          3
 Hailstorm                Conj/Ice       100%       3d16      1%          3
 Inner Flame              Hex/Fire       69%        N/A       1%          3
 Launch Clockwork Bee     Frge           100%       N/A       1%          3
 Maxwell's Portable Pile  Tloc           100%       (3-9)d9   1%          3
 Mephitic Cloud           Conj/Alch/Air  85%        N/A       1%          3
 Ozocubu's Armour         Ice            100%       N/A       1%          3
 Passwall                 Erth           69%        N/A       1%          3
 Stone Arrow              Conj/Erth      100%       3d13      1%          3
 Summon Ice Beast         Ice/Summ       83%        N/A       1%          3
 Volatile Blastmotes      Fire/Tloc      100%       2d18      1%          3
 Awaken Armour            Erth/Frge      100%       N/A       1%          4
 Dimensional Bullseye     Hex/Tloc       41%        N/A       1%          4
 Flame Wave               Conj/Fire      99%        2d21      1%          4
 Forge Blazeheart Golem   Fire/Frge      99%        N/A       1%          4
 Forge Lightning Spire    Air/Frge       83%        3d11      1%          4
 Fulminant Prism          Conj/Alch      49%        3d21      1%          4
 Ignite Poison            Fire/Alch      87%        N/A       1%          4
 Iskenderun's Battlesphe  Conj/Frge      100%       2d18      1%          4
 Leda's Liquefaction      Alch/Erth      39%        N/A       1%          4
 Olgreb's Toxic Radiance  Alch           87%        N/A       1%          4
 Petrify                  Alch/Erth      39%        N/A       1%          4
 Rending Blade            Conj/Frge      100%       2d(14+10*)1%          4
 Sticky Flame             Fire/Alch      87%        2d13      1%          4
 Vhi's Electric Charge    Tloc/Air       100%       N/A       1%          4
 Alistair's Intoxication  Alch           58%        N/A       1%          5
 Alistair's Walking Alem  Alch/Frge      99%        N/A       1%          5
 Arcjolt                  Conj/Air       41%        1d51      1%          5
 Freezing Cloud           Conj/Ice/Air   46%        6-21      1%          5
 Hoarfrost Cannonade      Ice/Frge       54%        3d9/3d19  1%          5
 Irradiate                Conj/Alch      49%        3d28      1%          5
 Metabolic Englaciation   Hex/Ice        41%        N/A       1%          5
 Nazja's Percussive Temp  Frge           54%        4d13      1%          5
 Summon Forest            Summ/Tloc      41%        N/A       1%          5
 Forge Monarch Bomb       Fire/Frge      49%        4d17      1%          6
 Fortress Blast           Frge           100%       6d10      1%          6
 Gell's Gavotte           Tloc           54%        2d(35-53) 1%          6
 Sculpt Simulacrum        Ice/Alch       49%        N/A       1%          6
 Starburst                Conj/Fire      49%        6d14      1%          6
 Call Canine Familiar     Summ           44%        N/A       3%          3
 Confusing Touch          Hex            44%        N/A       3%          3
 Fugue of the Fallen      Necr           44%        N/A       3%          3
 Gloom                    Hex/Necr       88%        N/A       3%          3
 Sigil of Binding         Hex            44%        N/A       3%          3
 Swiftness                Air            44%        N/A       3%          3
 Tukima's Dance           Hex            44%        N/A       3%          3
 Vampiric Draining        Necr           44%        2d9       3%          3
 Bombard                  Conj/Erth      45%        9d8       4%          6
 Permafrost Eruption      Ice/Erth       45%        2x4d10    4%          6
 Lee's Rapid Deconstruct  Erth           34%        3d17*     5%          5
 Eringya's Noxious Bog    Alch           43%        4d6       5%          6
 Conjure Ball Lightning   Conj/Air       41%        3x3d13    8%          6
 Anguish                  Hex/Necr       22%        N/A       9%          4
 Animate Dead             Necr           44%        N/A       9%          4
 Dispel Undead            Necr           44%        3d17      9%          4
 Martyr's Knell           Necr/Summ      44%        N/A       9%          4
 Borgnjor's Vile Clutch   Necr/Erth      29%        N/A       11%         5
 Disjunction              Tloc           54%        N/A       17%         8
 Curse of Agony           Necr           44%        N/A       21%         5
 Silence                  Hex/Air        22%        N/A       21%         5
 Hellfire Mortar          Fire/Erth/Frge 45%        4d15      21%         7
 Plasma Beam              Fire/Air       34%        2x1d47    22%         6
 Rimeblight               Ice/Necr       41%        2d8 (prima34%         7
 Fulsome Fusillade        Conj/Alch      49%        (3-5)d17  45%         8
 Death Channel            Necr           22%        N/A       71%         6
 Summon Cactus Giant      Summ           22%        N/A       71%         6
 Lehudib's Crystal Spear  Conj/Erth      45%        10d11     71%         8
 Platinum Paragon         Frge           54%        4d20      89%         9
 Polar Vortex             Ice            54%        12d7*     89%         9
 Magnavolt                Erth/Air       29%        4d14      92%         7
 Haunt                    Necr/Summ      22%        N/A       99%         7
 Sphinx Sisters           Hex/Summ       22%        N/A       99%         7
 Fire Storm               Conj/Fire      49%        8d13      99%         9
 Borgnjor's Revivificati  Necr           22%        N/A       100%        8
 Maxwell's Capacitive Co  Air            22%        ∞         100%        8
 Chain Lightning          Conj/Air       41%        3d55      100%        9
 Death's Door             Necr           22%        N/A       100%        9


Dungeon Overview and Level Annotations

Branches:
Dungeon (15/15)        Zot: 20816       Temple (1/1) D:5      Zot: 5985       
   Lair (5/5) D:9      Zot: 12350        Swamp (4/4) Lair:3   Zot: 15657      
  Snake (4/4) Lair:2   Zot: 10110        Slime (5/5) Lair:5   Zot: 23394      
    Orc (2/2) D:9      Zot: 7296           Elf (3/3) Orc:2    Zot: 8470       
 Vaults (4/5) D:14     Zot: 8448         Crypt (0/3) Vaults:2                 
 Depths (2/4) D:15     Zot: 9555         Sewer (visited)                      
 WizLab (visited)                      Gauntlet (visited)                     

The Realm of Zot is guarded by orbs of entropy.

The skills are a little more spread out than optimal, because I like variety.

Anyway, I got the Dark Maul.
My first instinct was that this is a unique opportunity to do the funny Dark Maul Manifold Assault spam.
However, that does require me training my M&F skill up from 4 to 27 to make it actually good I think.

The second idea I had is that I can give the Maul to the Platinum Paragon, which is at 89% fail rate and therefore achievable, and I’d probably have to train 14 M&F skill and get myself a demon whip to get the attack rate up.

Thoughts?