I'm pretty proud of this one.
I started this with henchies only just to see what it was all about, and found out when I got to this part that I was supposed to split my group to both protect the priest and get the crystals one at a time. Well, you can't split your group when you have henchies only, but I tried it and completed the quest anyway.
Did it with a lot of running back and forth - halfway to the enemy, then back to protect the priest from wanderers, then back to aggro part of the enemy, then back again to protect the priest again while at the same time killing the aggro'ed enemy that followed. Then back to get the crystal. Did this 4 times! Lot of work, my char died twice but got resurrected by the henchies who kept on fighting in my absence.
So, anyway, it can be done
