This.
Basically focus on Capping hit first once that is done work on Crit, of course try not to sacrifice spell power too much but tbh it doesn't matter much.
as for rotation on single target trash/bosses:
Living Bomb-->Scorchx2(glyphed)-->FFB then refresh scroch and LB when needed and Pyro Blast when Hotstreak procs.
on multi target (3+): i just spam Blizzard (DPS skyrockets with 4+ mobs

)
And with my Cooldowns i use Combustion, Icy Veins and Mirror images together for the most DPS also pop a trinket. I either do that at the beginning or if/when a shaman Bloodlusts.
some other tips to maximize DPS:
-Don't use Fire blast
-If Hot streak procs cast scorch FIRST then Pyro so you don't overwrite any ignites w/ scorch (Ignite Munching)
-Download Scorchio2 to keep track or Scorch and Living Bomb timers, i guess polymorph too
Basically this it your stat focus:
Hit(till Capped 368 w/ Precision) > Crit = Spell Damage (get crit w/o sacrificing Spell power) > Haste (not important)
Glyphs:
-Improved Scorch
-Frostfire Bolt
-Molten armor (thats what i use)
most people over look this but get a helm that has a Meta Socket and get
Chaotic Skyflare Diamond
it is by far the best thing to have for a FFB mage... period.... According to Elitist Jerks the Tier 5 helm that has a Meta gem is better than a 25naxx helm w/o a meta gem
I suggest getting a Tailor to make you a
Hat of Wintry Doom
I havent been to the Dummy lately (then again it wont help you much since i have T7.5gear ><) but i'm sure your DPS will go up by a lot just switching your spell rotation that plus the Hit and Crit will make you a beast
Armory in my sig if you want to look at stats and talents
