I'd definately go over to the macro forum and check out the warlock Destro /click macro set. I was pulling over 3k dps in blues on my lock, and now that hes in epics, he can do 4k easily, and i pulled a 4.7k on a sarth 25 pug. I also have a mage, I tried frostfire, firebolt and Arcane specs, and arcane is the most consistent. Firebolt/frostfire were crap on short and sweet trash fights, not enough time to get hotstreak procs. Bosses, they would be about the same as arcane, and although the group did more DPS due to the scorch debuff, i was better off sticking to arcane. Ive got a very similar setup, but have a second lock instead of the boomkin (boonkins are 66 )