The number one rule for casters is ALWAYS BE CASTING. This means you want to fill your global cooldowns with abilities always, even an "incorrect" rotational ability is more damage than no ability, with respect to mana of course.
Arcane Mage dumps mana to do damage via:
Arcane Blast: Single target, main spammable ability.
Arcane Missiles: Single target ability, use when proc'd by
Missile Barrage.
Arcane Wrath: Strong Single target ability, long cast time.
Fire Blast Single target ability used to build up
Heating Up
Pyroblast Strong Single target ability used when at 3 stacks of
Heating Up
Arcane Explosion: AoE ability, main spammable ability.
Arcane Power: Powerful cooldown.
Conjure Mana Agate: Or other similar mana gems to restore mana.
Evocation: To restore mana if no gems or potions available.
Single Target Rotation Priority:
- Precast
Pyroblast (or any precast really) - Cast
Pyroblast if
Heating Up is at 3 stacks - Cast
Fire Blast on cd to build up
Heating Up - If
Missile Barrage proc's at any point, use
Arcane Missiles - If safe to cast and available, use
Arcane Wrath - Fill rotation with
Arcane Blast if your mana supports it - Use
Presence of Mind on
Arcane Wrath or use
Presence of Mind if you need an instant cast to move - If you are OOM (out of mana) look to restore your mana with various mana gems like
Conjure Mana Agate or other mana gems, potions like
Mana Potion, or
Evocation. - Use your Wand.
Basically this spec use
Fire Blast on cd to gain
Heating Up stacks, and use
Pyroblast when you have all stacks. If at any point you proc
Missile Barrage, use it. If
Arcane Wrath is up and its safe to cast, use it. After that use
Arcane Blast as long as your mana supports it.
Pop
Arcane Power if talented and any racial abilities early on after your precast, couple it with
Presence of Mind for big damage.
AoE Rotation Priority:
- Precast
Flamestrike if it is possible, be careful of precasting this as it has high threat. - Spam
Arcane Explosion - If you are OOM (out of mana) look to restore your mana with various mana gems like
Conjure Mana Agate or other mana gems, potions like
Mana Potion, or
Evocation. - Use your Wand.
Basically precast
Flamestrike if possible, and hammer away
Arcane Explosion forever.
Pop
Arcane Power if talented and any racial abilities early on after your precast.