This is what I have been trying to say, and even holy can dps alright, resto is ok too, if you make use of Tree form to get extra dps out.
The fact that a spec is capable of casting damaging spells does not make it a DPS spec, please don't say such ridiculous things in a thread where someone is trying to get help with his character.
I, for one, have absolutely no doubt that Arcane, as an entire spec, in both PvE and PvP is going to end up in the toilet throughout the entire MoP expansion. You can bookmark this post, screenshot it if you wish, but you will see that that statement of mine will stand the test of time.