Thank you for the critique, Daedalus. I like your wording fixes, so I incorporated them into the first post.
There are quite a few Monsters in this Quest (33 in fact), but the Heroes are not required to face all of them unless they want to go treasure hunting, so I think they are unlikely to get into too much trouble unless they trigger either of the Falling Block traps directly in front of a door and then choose to press forward instead of backwards (in which case they will probably die, as the room in the upper-left has no exit and the center room has the Cloud of Chaos cultists! )
As for the Cultists naturally having spellcasting power... somehow we haven't made a consensus decision on that yet. I'm gonna make one more post in that topic, but I would just as soon have Sjeng or GK make an executive decision just to put the matter to rest. It's not going to make any difference for this Quest, though.