Let's talk about my rotation then.
Offensive buttons
Arcane Power
Mirror Image
Arcane Blast
Nether Tempest
Arcane Missiles
Arcane Barrage
Arcane Explosion
Fire Blast (when Arcane locked)
Defensive buttons
Incanter's Ward
Blink
Blazing Speed
Slow Fall
Greater Invisibility
Ice Block
Frost Nova
I use every single one of those buttons just about every time I log, so why the "three button" hate? Would you prefer spell bloat?
And yes, I'm bored at work right now.
I was joking. Love playing a mage too.