We snagged the fastest Patchwerk kill on WWS tonight with a 1 minute 51 second kill.
The two arcane mages were the top two, at about 6,700 dps. Not too shabby!
(edit) WWS of Patchwerk: http://wowwebstats.com/kebtyff14q6xw?s=280163-299804
I put together a video to help answer questions about how to get the most out of Arcane:
That page has the YouTube video, and also has a strategy guide to help with gearing, rotations (including what to do when you think you're running out of mana), cooldowns, etc.
I know it's old hat to a lot of people reading here, but it may be useful for mages who haven't made the arcane jump, who want to know what the best rotation is, or other sorts of questions about arcane.
Hope it helps!