Spell Priorities:

1) Scorch cast once to enable Critical Mass if not on boss
2) Living Bomb
3) Pyroblast only instant cast from Hot Streak proc
4) Flame Orb
5) Fireball

Cooldown Priorities:

1) Mirror Image
2) Combustion when Pyroblast DOT, Living Bomb DOT and Ignite DOT are active if possible

Molten Armor is the self buff used

Stat Importance

Intellect > Hit (to 17%) > Crit > Mastery > Haste

Reforging

1) Reforge your weakest stats until you've reached 17% chance to hit
2) Reforge Mastery and Haste to maximize Crit