Arlos wrote:31-33 Arcane + 18-20 fire is how I'm going with my twink mage, after a lot of consultation with mages I know about the viabilty of various specs. Basically, you want to go up through Arcane Power on the arcane tree, so that you can max out your DPS for short periods, so when you're doing a boss or something, you can really unload once the tank has aggro. Presence of Mind is a huge one as well, as it lets you have an insta-cast pyroblast, flame strike, polymorph, whatever if you should happen to realy really need it.
Honestly, Arcane Power is primarily useful for PvP. Regardless of the build, a mage can empty their mana bar more quickly than a tank can build aggro if you really want to. You don't need Arcane Power to manadump in PvE. It is, however, a great PvP talent combined with Pyroblast and PoM. Overall, I'd rather have Blast Wave and Critical Mass than Arcane Power.
Fire is a good one to pair with Arcane, because most frost spells are already fast-casting or insta-cast already, so you don't get as much benefit from POM. The important ones to get in fire, if you're doing a build like this are: Impact 5, Improved Fireball 5, Ignite 5, & Pyroblast. Incinerate 2 and Flame Throwing 2 are also pretty useful.
The only talent in the Arcane tree that Fire Benefits from more than Frost is Presence of Mind, and Arcane Concentration is wonderful when paired with Frost Channelling. I'd still recommend pairing a heavy Arcane build with Fire, simply because it costs fewer talent points to obtain decent DPS than it would in the Frost Tree.
Please don't waste five points on Impact. Reducing your chance of being interrupted is much, much better than a ten percent chance of a two second stun. If you rely on fire spells as your primary damagers, you'll average about one stun every two fights. This is one second of stun per mob, hardly worthy of five talent points.