This mob casted Rage of Rallos Zek. I don't remember at what level of health but it blasted all my WTD pets and finished off my Tier 5 Warrior merc. At that point it was all over but the crying.
I got hit for 7220, Shammy for 6840 and Cleric for 7505.
I FD and the mob killed the rest of the group. Then the mob stood on me for 5 minutes before I finally got up and tried to run. Of course the mob followed, casted a stun and FD spell on me and sat on me again until I stood up.
I was not in any mood to recover. I'll try again tomorrow.
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85 Necromancer Brumelin Badassedness of Terris Thule