Yesterday me and my friend (he is arms warrior) were doing weekly ZG clear for mounts and we've had an interesting bug. He killed Thekal with Mortal Strike on phase 1, so the boss had MS debuff on him. When it entered Phase 2 (tiger form), it returned at 50% health, most likely because of the fight mechanic - when Thekal dies in P1, it heals itself for 100% HP, then it enters P2. So I suppose that any class with MS-like ability (Hunter, Rogue, Warrior, Shadow Priest in 3.2, Frost Mage in 3.2) will be able to gain benefit from this glitch.
I hope that I've been helpful as this is my first contribution on this site. Thank you and have fun!![]()