Almost done with lvl 66 and haven't even felt close to needing a resto shammy with a 1x/4x pal/sham setup. I've run Ramps, BF, SP, UB, and MT now without too much trouble. I've been preparaing for the eventual need for resto by handing more +healing gear to one of my shammies, but they're all still geared and spec'd for elemental dps.

The only really challenging fight I've had was Black Stalker at the end of Underbog.. until I realized I wasn't using a nature resist totem. Doh!