Post by nickseng
What do you plan to do with that build, pvp or raiding? or just casual playing?
Still, your tree seems ... a bit weird. Why spec so much into fire if you're not planning to use fireball? And while i personally love Arcane Missiles, i wouldn't level solely using it.
As for improvements, I'd say skip Improved Wand and Arcane Fortitude, they won't help you much. Definitely take Arcane Concentration, it rocks.
IMHO, if you plan to use arcane spells so much, you might want to spec deeper into Arcane to get all the goodies down there. It seems counterintuitive to spec so much fire to mainly use Arcane spells.
Here's my current Arcane heavy build. http://www.wowhead.com/?talent=oixVc0fztIuioVx0z
It's not the best, but I like it, and I think it would be better than your build especially if you plan to use more arcane spells.