Originally Posted by Miltiades
I looked up the Harrowers. Seems like they get some kind of buff that you absolutely need to avoid. Run away when they become immune, then finish them off when the buff disappears.
hahahaha. Shows what I know about the fight. I did it within the post couple weeks. I killed them easily (overleveled) and never even noticed they went immune, CrisG, watch the video, you should be fighting only one at a time. This looks like a guardian too, so it may give you some idea as to what attacks to use and when. Guy seems to know what he is doing. Also make sure you are repairing your gear, using stims, medpacs and when needed use unity and heroic moments.