All I can say is, wow.
Started up this team last night, have extremely little practice as Ret in Arenas, and still went 8-2 for our 10 games.
The burst is so intense, and I was hitting for two 2000s in one second thanks to Windfury. With the MS debuff, it allows us to rip apart anyone, especially healers, with this combo. Any clothie is immediately decimated, no matter the gear. We struggle more on plate wearers, but we can still get them down because of the amount of pure hurt we're putting on them. Besides the damage, we have the ability of being very hard to take down, with my defensive buffs, and the Shaman's offensive Purge.
The only teams we lost against were the ones that seriously outgeared us, and who we can't burst down immediately. I only have 169 resilience, so I'm pretty squishy even in my plate. They usally target the Shaman, but he's a skilled player and knows what to do.
Our tactics are to take out the healer first, unless it's a Paladin. It's basically over after that, as we single target the rest and just nuke to our hearts content. If it is a Paladin healer, we will debuff the squishiest DPS (Rogue, Mage, etc.) and take him down. The reason we don't go after the Paladin if it's a healer is because once we get him down to a low %, he'll simply bubble and go back to full, therefore wasting our openers and stuns, etc. Rather, it makes it harder on the Paladin to cause him to waste mana with big, slow heals that he may never get off.
If anyone runs with this kind of team, or would like to know more about ours, please post! I'd like to get opinions and the like.