Sweet! Spirit Hosts it is. I have my answer now.
Edit:
K'daai Destroyer (325) vs. 8 Crypt Horrors, Crypt Haunter (4 x 2, 314)
K'daai charges (higher M). Burning Body inflicts 3 S4 hits on Crypt Horrors. 3 hits, wounding on 5+, allowing no saves.
Math: (3)*(1/3) = 1.00
K'daai strikes first. 6+D3 attacks, hitting on 3+, wounding on 2+, allowing no saves.
Math: (8)*(2/3)*(5/6) = 4.44
Crypt Horrors strike second. 19 attacks, hitting on 4+ (6s auto-wound), wounding on 6+ (must be re-rolled), allowing 4+ Ward save.
Math: (19)*([1/3]*[1/36] + [1/6])*(1/2) = 1.67 ~ 2 Wounds
Destroyer Wounds: 1.00 + 4.44 = 5.44 ~ 5 Wounds (7 Crypt Horrors remain; one has 1 Wound left)
CR (CD): +5 (Wounds) +1 (charge) = +6
CR (
VC): +2 (Wounds) +1 (ranks) = +3
CD win by 3,
VC crumble by 3 (6 Crypt Horrors remain; one has 1 Wound left).
Round 2:
Burning Body inflicts 3 S4 hits on Crypt Horrors. 3 hits, wounding on 5+, allowing no saves.
Math: (3)*(1/3) = 1.00
K'daai strikes first. 6+D3 attacks, hitting on 3+, wounding on 2+, allowing no saves.
Math: (8)*(2/3)*(5/6) = 4.44
Crypt Horrors strike second. 13 attacks, hitting on 4+ (6s auto-wound), wounding on 6+ (must be re-rolled), allowing 4+ Ward save.
Math: (13)*([1/3]*[1/36] + [1/6])*(1/2) = 1.14 ~ 1 Wound
Destroyer Wounds: 1.00 + 4.44 = 5.44 ~ 5 Wounds (4 Crypt Horrors remain; one has 2 Wounds left)
CR (CD): +5 (Wounds) = +5
CR (
VC): +1 (Wounds) = +1
CD win by 4,
VC crumble by 4 (3 Crypt Horrors remain; one has 1 Wound left).
Round 3:
Burning Body inflicts 3 S4 hits on Crypt Horrors. 3 hits, wounding on 5+, allowing no saves.
Math: (3)*(1/3) = 1.00
K'daai strikes first. 6+D3 attacks, hitting on 3+, wounding on 2+, allowing no saves.
Math: (8)*(2/3)*(5/6) = 4.44
Crypt Horrors strike second. 4 attacks, hitting on 4+ (6s auto-wound), wounding on 6+ (must be re-rolled), allowing 4+ Ward save.
Math: (4)*([1/3]*[1/36] + [1/6])*(1/2) = 0.35 ~ 0 Wounds
Destroyer Wounds: 1.00 + 4.44 = 5.44 ~ 5 Wounds (Crypt Haunter remains; has 2 Wounds left)
CR (CD): +5 (Wounds) = +5
CR (
VC): +0 (Wounds) = +0
CD win by 5,
VC crumble by 5 (Crypt Haunter dies).
I will admit, that's a fair bit closer than what I thought it would be, and 9 of them (plus maybe some IoN support) might be able to take him down. But in default circumstances, the Destroyer still wins.