Quote (Farrell @ 10 May 2021 07:47)
Bug him. Lock him somewhere and make him teleport to you. Inner cloister is an easy and repeatable place to do so (go down the jail stairs and up again, race through the door and close it before your Merc goes through it and run on the other side. Then simply wait for him to appear next to you and voilĂ )
That way pretty much any monsters but a few archers and hydras will simply ignore him even though he's poking the shit out of them.
This is a great answer and one of the best ways to beat hell ancients also...