As an Illusionist I have 8 spells that I spam in combat constantly and probably 4-6 other spells that get mixed in as permitted. DPSing as an Illusionist with Perpetually is one of the craziest key spamming specs I have played in a MMO yet. You get a buff that basically makes you cast faster and faster the more you spam. I usually get a hand cramp after about an hour of raiding.
I have yet to see where mezzing helps on raids (I know there are ocasions where Heroic mobs spawn you have to mez) as my mez only lasts for 15.8 seconds on Epic mobs and my mez is usually broken the second it lands anyways.
