Hi!
While the game has at times been really though, until this fight there you could always improvise - draw some enemies away, go around a corner and let them come to you, etc.
I don't see any chance whatsoever with Ba'al!
My hero is level 35, I've got the best equipment I could find, but as soon as I enter the room, I hear this "boom-boom-bang" shot that will hit you no matter whether you're behind cover or not, my health goes 900-600-300-dead within one second.
In several dozen attempts, the most damage I could cause him was 2. Which he suffered while I was already dead.
Is there some quest I have to go through to weaken him or something?