I was getting ready to run this set piece as a side quest for my group as a way to cope with one of my players not being able to be at the game. Now it looks like I will have all of my player, and a few have leveled. I'm looking for a couple of suggestions or ideas how to scale this adventure.
The party consists of:
a Paladin (12th) - currently an NPC, and easy to remove from the adventure.
a rogue/sorcerer (12th)
a scout/wizard/loremaster (11th)
a soulknife/soulbow (11th) (whoever came up with this prestige class should be shot) ;)
a cleric (11th)
a fighter (10th)
Increasing the number of cultists would be the easiest, except that the cramped quarters of the living quarters would work against the cultists. I thought about changing the cultists from warriors to fighters to give them some extra power, and have Vodzur summon the dretches before the party shows up.