As I am one of the few (only?) mages who still believes in the fire spec - I will plead my case here.
Although a more complicated rotation, and less dps, the fire spec will typically net out at more total damage when played correctly. It depends on a utilizing your procs efficiently and keeping Living Bomb active as much as possible.
My main glyphs are Living Bomb, Improved Scorch, and Fireball. However, I can change the Improved Scorch to Molten Armor if I know a desctruction Lock with Improved Shadowbolt or another mage with Improved Scorch is in the raid. However, with most TOC raids, you change target so much that I find it easier to stick with Imp Scorch.
As for rotation - I start off with one Scorch. With Improved Scorch, this is equivelent to 5 Scorches and begins your fire debuff. The fire debuff will increase your crit with fire spells by 15% I then will throw a Living Bomb. This begins to tick off before I begin my rotation. Sometimes I will swap these two since you can start with a Living Bomb on the initial pull and not gain aggro.
I then jump into my regular rotation of Fireballs. When scorch is low, I recharge. When LB explodes, I restart it. Lastly, I fire off my pyro as soon as it procs without interupting my current spell cast. The use of the pyro efficiently is a very important piece to maximizing the damage and dps. You can actually begin your pyro cast before your fireball completes thereby firing two spells simaltaneously.
Pros and Cons about running this spec:
Pros
- Fire mages will be near the top of the damage meter in nearly any raid and should be higher than a comparably geared arcane mage
- Fire mages have better AOE options with LB than an arcane mage - but less than frost
- Takes more advantage of the crit heavy tier pieces than arcane (pyro procs)
- Fire mages are a bit more mana efficient than arcane mages
Cons
- Fire mages need over 200 more hit than arcane mages
- Fire mages have a more complex rotation than arcane
- Fire mages have considerably more aggro problems than arcane mages
The other slight difference is in the value of statistics for each class. A typical mage will see the following:
Hit (until cap) > spellpower > haste > crit > int > spirit
A fire mage will see crit as equally important to haste until about 45% base fire.
I welcome discussion! I could use another fire mage to join me. More DOTS!