Originally Posted by
Saiyoran
Fire is indeed viable for realm/region times (though not for world times atm). The trick with CMs as Fire is that Combustion is essentially worthless because you have no mastery. Almost 100% of your damage is going to be Living Bomb/Dragon's Breath on AoE. Prophecy is really RNG, I personally find it pretty good, but GSR from foundry is probably a more consistent option. For AoE, I typically spec Cold Snap (your biggest CD, since Dragon's Breath is >30% of your damage), Living Bomb (spread it with IB then again with Combustion > IB and hope you can get some additional bombs up with this), Incanter's Flow, and Meteor (crystal I find is better saved for your single target spec, which you'll want to have to swap to for bosses where pushing a dps check matters), though the lvl 100 talents are all pretty lackluster for mass AoE.
For your single target spec, Blast Wave/Crystal/Mirrors is pretty respectable burst, though you're not going to beat Frost/Arcane in a burst situation without some really good RNG. GSR and Copeland's are pretty much unbeatable here, even if you wanted to go PoF for your AoE setup.
Make sure you glyph Inferno Blast and Dragon's Breath, the 3rd glyph slot is pretty much whatever.
Let me know if you have any questions, I ran with a fire mage for a while for some realm times before I moved to a double shaman team.