Mages: Arcane DPS

Since 3.1 I've noticed a lot more mages moving into Arcane territory. I dug up some info, looked at the math, and spoke with a couple of top DPS mages who have a general consensus about the Arcane build:

Arcane Spec: 57/3/11
Major Glyphs: Arcane Blast, Molten Armor/ Mage Armor, Arcane Missiles

Rotation:
1) Your regular rotation, unless severely limited by mana, should ALWAYS be ABx3-AM-Abar, REGARDLESS of missile barrage proc. Remember to use Abar before the 5th tick of AM.

2) Your stacked cooldown rotation, unless severely limited by mana, is spam AB, use AM-Abar ONLY when missile barrage procs. Remember to use Abar before the 5th tick of AM.

3) You should try to stack your cooldowns with heroism but not at the expense of missing the 2nd use of any cooldown. You should always stack IV and AP together.