if you want to go there for whatever reason, fine, good luck. but that is NOT where you are supposed to be going at all if your trying to continue on with the story. your supposed to go to phon coast and past that too. the necrohol of nabudis and the other exit to the west are either optional or for later in the game.
your next destination is phon coast. how do i know? i’m the same lvl’s as you (overlvled for the games storyline). the fact that were overlvled for the games storyline and we STILL can’t beat those monsters is a real good clue that we are not supposed to be there yet. unless you REALLY want something from in there, i don’t know.
however, if your ahead of me in the game, and your SUPPOSED to go in there, then your way UNDERlvl’ed. lol. i’m 34/45 and i haven’t even ENTERED the phon coast yet. just an example.
Set your players’ gambits to ice weak = blizzira or blizziga. They hate ice and you can nail several at a time. Just make sure you have one character healing the party.