Right now, we're doing 118 damage (before dice-based skills) (120 if 1011 uses acid in the next 30 minutes). That leaves 59 (57) damage that needs to be done by a roulette and a pinpoint. That shouldn't be too hard.
The maximum damage roulette can do is 34. It's unreasonable to assume it'll actually do that much though. It's more reasonable to assume that I'll get at least one guess right and do 45 damage (knocking the health down to 14, completely in kill range of roulette).
If all else fails, we still have that 10% chance of complete misfire.
(though I wish Calindu would've gone for the consistency of roulette ._.; )
Pinpoint 6,7,5,10
These numbers and we pray.