for Baldur's Gate 1. I'm not sure you can beat him without tons of wands of monster summoning, but it feels really cheap. There are spoilers here for the ending of BG1.
Here's the way I've always done it: fully buff my party and position them where the invisible mage appears, then summon monsters there too. After I speak with Sarevok, I pull my main character back, use a scroll of magic immunity, and move all of the rest of my party AWAY from the place where the mage appears: EVERYTHING depends on avoiding the confusion tattoo thing he does when surrounded.
After killing him, it becomes possible to pull Sarevok without aggroing his allies. Here is where the wands of monster summoning are mandatory: it doesn't matter what armor or buffs you have...this guy will pretty much one or two shot EVERYONE, and he rarely misses. the trick is to get the summoned monsters to agro him, then shoot him to death with super expensive enchanted arrows..
o
IS THERE A WAY TO DO THIS WITHOUT CHEESING THE WHOLE ENCOUNTER? Sarevok just feels so grotesquely overpowered on higher difficulty. you can't fight toe to toe with him.(granted there are a lot of encounters in BG where you can't really fight toe to toe. but still.)
After killing him, it becomes possible to pull Sarevok without aggroing his allies. Here is where the wands of monster summoning are mandatory: it doesn't matter what armor or buffs you have...this guy will pretty much one or two shot EVERYONE, and he rarely misses. the trick is to get the summoned monsters to agro him, then shoot him to death with super expensive enchanted arrows..
o
IS THERE A WAY TO DO THIS WITHOUT CHEESING THE WHOLE ENCOUNTER? Sarevok just feels so grotesquely overpowered on higher difficulty. you can't fight toe to toe with him.(granted there are a lot of encounters in BG where you can't really fight toe to toe. but still.)