I must say, that having 1 fire resistance will not help. What party do you have? If you have a monk that is relativly easy. There is a spot in the left/right side of the chamber where one monk will be stuck behind the other. If you have druid consider downloading the ease of use mod, and turn him into rhemoraz. I never tried beating the 8 chamber any other way, so i do not know about anything else. Does not mean though that it can't be done with another tactic.
just my 2 0.01 $
