Some bosses will after they switch target to you to do a spell then proceed to do a melee hit before switching target back to the tank. If you are not wearing plate he will most likely oneshot you.
The bosses I know do this is:
Anetheron
Akil'zon
Jan'alai
Some bosses will after they switch target to you to do a spell then proceed to do a melee hit before switching target back to the tank. If you are not wearing plate he will most likely oneshot you.
The bosses I know do this is: Anetheron Akil'zon Jan'alai