The death imp's look to be in the fight to keep people from staying ontp of the geometry up top, but sometimes when trigon does his suck in ability random people are getting one shot by Death Imp's Execution from the imps above because the game thinks they're trying to fly above or whatnot erroneously. It's making the fight a lot harder when several of your group die when Trigon pulls everyone in... and not from trigon's dmg.
