Was too hard for me, I got one enemy drop then got the fuck out (I'd ferried Moot to the exit on a flyer, ready for a one-click escape).
I ferried to the exit then did some strategic shuffling down the bottom. Stationed a couple of fliers near the chest, keeping out of bow range. About 4 turns in one of the outlaws opened the chest, took him out and exited. Was a close call as my main man was about to take a beating at the top.