Took my DF group probably 3 maybe 4 tries to beat it because the first 2-3 nobody was using the dragonkillers, so I the second healer ran up and did it myself, because of where I was positioned for most of the fight I never actually saw the snares/chains so I missed the second Dragonkiller firing it too early. I immediately noticed what I did wrong and we still ended up winning that round (with probably 1 hit left on the duty fail gate everyone knows and loves)