Grunker
RPG Codex Ghost
Just finished up the cultist demon boss for ToSC. Jeez I don't remember this guy being so tough.
My Berzerker and Kensai playthroughs mowed this guy down instantly. I had to actually use some strategies to win.
Maybe because the game got patched he's tougher or I didn't have the right protection spells? F/M multi will get strong eventually right?
Did you play SCS? Cultist fight competes with final battle for toughest fight on SCS.
On non-SCS it can be trivialized with wands among other things