Feared bugged

Just had a bug in the feared where the incarnation of dread's engulfing flame attack killed me twice before it went of visibly. Maybe it was due to the incrased attack, cast and movement speed.
It's already a horribly designed fight with the sirus bs, but it would be nice if I don't get killed by an invisible attack.
Please fix it, and while you're at it, maybe switch out a few bosses, never thought I would miss atziri and chayula.