I would prefer another elite instead of this. If you use Zealous daggers and Critical Eye you should be full of energy, as I feel that way. Also since it's an enchantment I don't like it as much. I think it should become a "skill" like Critical Eye.
It's been fixed... if you go to the same area WITHOUT having the quest active, there should be some other boss (Illidus or something) that also has the skill...