Yep i recently dusted off my mage i havent played since tbc and arcane is the way to go with low end gear as it has VERY low hit rate which means more SP/Haste/Crit can be taken through gems and all. Definately try arcane out its probably my fav spec atm (was a diehard fan of fire back in tbc)

Correct me if im wrong but im pretty sure EJ said that this new arcane is 1% dps more than fire atm so fire or arcane (whichever you prefer) is the way to go this patch :D

The best part of arcane is that no matter how much mana you have, there's a rotation for you. You can get by fine with the mana you have.

Start with the full rotation of Blast, Blast, Blast, Blast, then Missiles if proc'ed, else barrage (can also spam blast until you get a proc, but thats not very mana efficient) - repeat. Use your mana gem as soon as you can get the full effect without wasting any mana. Continue this until your mana is low enough to use your evocation for full effect. Only now, once both gem and evocation are on cooldown do you ease off on how many blast stacks you use, based on your mana. if you're low, just cycle blast barrage, back and forth. If evocation is about to come off of cooldown and you aren't already below 25% mana, kick your rotatino back into high gear so you can use evocation as soon as it is up and not waste any mana.