The Butcher's shrine things (I forget the name - Sacrifical Altar?)... what type of damage do they do? Docs don't say.
It looked like fire or maybe pink lightning, so I tried him at level 105 with 78% fire resistance and 80% lightning and cold (poison was low but it didn't look green enough to be poison). I could only get him to half his life before I died (merc was doing ok and so were summons).
I was playing cold sorc trying to get him with Abyss (which is hard to aim) buffed up with Firedance.