I know in a recent patch, they adjusted boss health values in Normal dungeons. I've heard some talk about this not working properly, but never any confirmation about what's going on.
I ran FG II Normal the other night and one of the bosses just took a ridiculously long time to kill. She had a giant health pool and what seemed like 90% mitigation. We literally sat there for 15 straight minutes just picking away at her until she finally died.
Is this some how working as intended, or are the adjustments they made bugged?