http://www.wowarmory.com/character-sheet.xml?r=Thaurissan&n=Achai
Arcane is the spec I use in PVE, I have enough gear to swap around to be hit capped for FFB too. I found that I generally do more DPS as arcane though, maybe because I don't have to sacrifice as much stats for hit, and maybe because it's less crit reliant. I am saving emblems for T7.5 pants, which I should be able to get tonight. But, gem, enchant and spec wise, is there much that I could change to get the most DPS?
My rotation for long fights is Arcane Blast*2 -> (Missle Barrage>Arcane barrage) or for shorter fights (more like mid length, since they have to live long enough) Arcane Blast *3 -> (Missle Barrage>Arcane barrage).
For Frostfire Bolt my priority was Instant Pyro > Living Bomb > Scorch (if imp rolling off) > Frostfire. I found this to give me less overall DPS, which I assumed was because of all the haste I have (damn hard to find decent crit rings).
But yeah, just general suggestions. I'm using a **** wand because A'nub rekan hates me.