Castle Ravenloft was stacking death debuffs just for standing in the instance. I hit 6 death debuffs in the last boss fight and eventually couldn't survive with that little HP in there. Suggest you look into this as the dungeon isn't possible with that happening. This group had members that included completionists in Infernal Citadel and ToMM.
This happened today in our Random Epic Dungeon queue.
Guild Leader: Under the Influence
Yule (Barb): 53k : Siren (TR): 52k : Torun (DC): 49k : Siren OP (OP): 52k : Siren SW (SW): 50k : Modern (F): 42k : Cherry1 (CW) : 42k Siren HR (HR): 50k