Team Caves:
Urgan is not being especially helpful, and we're few on people, and they now have more. Here's a quick run through of some possibilities, in the order I'd prefer:
1. move back 10' or so, and keep the Mercs alive. They essentially form a barrier then for the cultists, and we can focus on Siobhan and the solo Merc maybe, and then anyone else who gets through.
2. Urgan tries another illusion distraction, to sow at least another round of confusion, maybe as you kill Siobhan (can be combined with 1, keeping the Mercs alive)
3. run and escape. probably the most prudent choice right now.
4. stay and fight until the end. (differs form 1 and 2 in that we just go for it without coordinated plan).
1-3 all seem reasonable to me.