There is some inconsistency with mob aggro.
I usually use skills like redirect and night elf stealth to get mobs to focus brann since even healer brann cant keep me up but some mobs ignore everything and hard focus me til I'm dead. These aren't marked as stealth detectors either. Feels like some mobs are hardwired to kill you ingoring any checks on threath and other combat disengage mechanics.
Now the weird part: had the same mobs act normal and exhibit such behavior.
Makes me wonder if its a bug or something else.