Well, Sarevok is overpowered (for a party that level, has crazy HP and THAC0), but it's more Angelo and Semaj that really ruin my day. Angelo has those insane fire arrows (that for some unexplained reason don't affect his allies that much), and Semaj is just a pain in the ass, dispelling my buffs all the time. I cannot seem to win the fight unless I resort to cheesing through (spam Chaos while outside visual range) or taking advantage of the AI shortcomings.
Um. Protection from magic + ring of the ram make short work of him. Protection from Undead also makes him unable to target you. Also, you are immune to Imprisonment while in the Slayer form. Korgan and Minsc are immune while enraged, too. Cheese, but it's one of the worst designed monsters in all of the IE games. I mean, a demilich that ONLY casts Imprisonment, regardless of its efficacy? Devs please!
everytime i've used their beserker rage thing they still get imprisoned straight away