i killed Illidan in my last raid. and in my opinion what you realy need is just a good organisation and of course know your characters and a bit of personnal skill. But since add on have been made, you just ahev to do whatever the add on say. " stop dps" " XXXX attack iiminent " etc etc death of pve. if you don't use it ok you need some skill.
you can't compare a fps, where you're playing alone and if you don't camp like a pussy you will need personal skill to a MMO where 40 people are playing together. it's timing and organisation
anyway talking about wow in a fps forum was the best way to call for a shitstorm