I'll start with my armory,
http://us.battle.net/wow/en/characte.../Saji/advanced
I decided to try messing around with an obscenely high amount of haste (Currently 10071 Rating) and Frost Armor. On tuesday after the patch, I went to the dummies with a traditional Arcane strategy, Full mastery, get to 6 stacks, stay there as long as humanly possible, and then barrage to clear while using Missile proc's intelligently, averaged about 75k self buffed. Went into raid and did Zor'lok on Normal 25 as Arcane and pulled just shy of 100k. I had to switch back to Fire for progression then, but it showed promise.
I just went with basically the same idea, except with the full haste setup that you see in the armory now. Self buffed on the dummy I'm in the neighborhood of 90-95k consistently. The regen is so insane there is absolutely no reason to Barrage ever, if for some reason I do get unlucky with missile procs, I weave a scorch in and in that timeframe, I've regen'ed enough to go back to Blasting. On tests where I did Barrage, the dps values barely if at all skewed in either direction. I'd say on single target type fights just stay at 6 stacks and weave in scorches if necessary, on any sort of fight where you can abuse Barrage cleave just go ahead and reset.
Here's the kicker, I ran Simcraft ( Which I don't normally trust implicitly ) and it simmed at just over 120k once I changed the action list to more suit how I was playing Arcane, and even then I'm fairly certain I can't get simcraft to get really close to an optimal Arcane playstyle. I am faaar from BiS gear, and even with heavy movement, Arcane just feels like it's capable of being up there now. I will definitely be playing this on all of our progression this week.