I've been wandering around here for quite a while (the floor where the red beams turn on and off at intervals) and all I've managed to accomplish is killing everyone except my cleric multiple times and using a lot of energy potions. And turning those impassible areas where 3 red beams cross off and then on again, a couple times. I've uncovered almost all of the floor on the map and I'm no closer to turning off the beam that blocks the stairs up to the next level, or even knowing if that's what I need to do here.
What do I do? Thanks.
EDIT: I'm not as pissed as the person who posted 6 weeks ago about the beams on this level, but yeah, it's extremely tedious. If anything would get me to drop the game without finishing, it would be this.