is the proper frostfire build... that is all
(although... putting 2 points into flam throwing to give your scorch and living bomb the extra range is a valuable asset, so when i get to 80 i'll post my build, maybe i'll give up dragons breath and blast wave (we have 4 hunters to do aoe, also having to get into mele range to aoe is scary)
with minimal aoe for a primary single target nuke rotation.
now, in naxx lvl gear (25 naxx) this is the highest dmg output for mages. depending on itemization/class changed is 3.1 (the next tier of 25 man gear) fire may scale back up to ffb. as far as non critical dmg (ie 0% crit chance) fireball is the highest dps spell a mage has. however, raid buffed at 50% criticals are happening often, and the 3.2 crit multiplier on ffb is retarded, and in fact a ffb crit is the best scaling and highest dpm spell in the game. perioid. so, if there is a lot of crit on gear, ffb looks good, if there is a lot of dmg, and haste, deep fire looks good. only time will tell, but for the mean time, get to 10% hit, grab as much crit and spell dmg as you can, and throw one of those talents down. and as long as you can keep scorch up and living bomb up without clipping it, you'll throw 3k dps in your sleep.
as of right now, i would avoid haste if possible. if the sweet epic upgrade has more dmg and stats than your gear, but has a boatload of haste on it instead of crit, its still good, just never socket for haste to grab a yello socket bonus. (as of 3.0 right now)