We do 2 tank 3 heal and a very simple fog strategy.
On the pull healers stagger in to put Fog on the boss. ie. Priest at 1 stack, Druid at 2 stack, Paladin at 3 stack.
Warlock goes to 10 stacks. He puts his stacks on the boss/adds and portals in and out to refresh his stacks before they fade.
Myself on hunter stays out and work on getting my stacks to 20 ASAP. After the warlock drops his stacks I take over doing the same thing.
Disengage out at 18 seconds on Fog, portal back in when refreshed. Refresh as protectors are spawning.
With just one person having Fog stacks it is pretty easy to keep them up. I was going to buy stam trinkets but they weren't necessary. Hunter takes 15% reduced damage and 10% increased healing passively. On Get Away! with high fog stacks I use deterrence so I take 0 damage.
That made the fight very easy for us. And also avoiding the confusion of assigning/marking CC and just getting everyone to spam every bit of CC that they have when adds spawn. That helped.
edit: video
http://www.youtube.com/watch?v=_walV...ature=youtu.be