It will work, but there are better specs for PVE and PVP. I am guessing you are going PVP cause you are going for the quick damage of fire + arcane.
Check the sticky for more traditional builds.
IF YOU ARE GOING PVE here are my questions:
With respect to your build, I would ask why you do not have ignite. It can increase your damage by 40% of your original spell's damage. That is great.
You have taken 2/2 in incinerate - A boost to crit damage on spells that are NOT your primary damage in PVE. If you did this for the PVP benifits - ok.
Molton Fury? It's ok, but if you are raiding, there are better specs. (My thoughts being that you really only get to take advantage of this talent against bosses with lots of HP - unless you are raiding - you won't face that much.) If you are PVE regular mobs, you should 1 shot most things with <20%. If you are PVP, I don't know... I never was a huge fan of MF.
Finally - it seems like you are going you are going for the wow of burst damage from the Arcane tree, but picking up the high nuke value of the fire tree. If you want nuking - go deep fire/raid spec. If you want burst damage - I'd expect less fire and more Arcane to get AP.
It is a viable build, but not fantastic. (That said - I'm 0/0/61 for frost single mob crits, plus frost AOE farming mage. So my spec is about as stupid as it comes...)