1) The small heads on the sides and some of the tails are not damaging the player anymore. The only tail that did damage when I tested was the one on the right side of the main head.
2) Poison puddles are not shot if player stays at the edge on top of the map. Moving to either side of the main head before he gets enraged also stops it from hitting or spitting poison.

I was able to solo the raid without losing any health. Please fix it. Ty