I love healing, so I play resto but this setup works really well for me.
Resto with Feral affinity plus warmode on with the Master Shapeshifter and Overgrowth pvp talent.
Cat form with all its benefits. (Stealth, bleeds and etc) a bonus to movement speed and 25% increased damage. If you get into a pickle you just pop overgrowth and switch back to cat. If you really need to you can spam heal yourself to full.
You also get the benefit of increased magic damage if you want to switch it up with some ranged abilities.
It kills much much more quickly than gaurdian and has equally good survivability. Ive soloed almost every quest/elite/rare mob ive encountered. Plus its easy to get into groups for the random elites that require a small raid as resto.
Basically its the ultimate hybrid build. Ive never had more fun with any class than im having with this right now. I can do anything.