
As for full resto I wouldnt try anything other than this as a bare minimum http://db.vanillagaming.org/?talent#hZxZEcxtVeqo (2 points remaining)
If you happen to arrive in a geared guild where you feature more healers than necessary in the setup, you can think about switching to something like http://db.vanillagaming.org/?talent#hZxi0dVMZV0xtVha, however if your guild decides to optimise healer specs to support dps, in that case of a shaman you would probably be better off bringing that shamans dps alt for fights where you dont need the heal. You will be completely unable to be in a caster group (no mana tide) nor able to tank heal (no improved healing wave and Healing way), the only reason for you to be there would be swinging nightfall on trash in healing gear and having improved totems for melee + being able to use lesser healing wave + chain healing as efficient as the full resto shaman for raid healing... Very limited field you can be assigned to by the healing assigner.
Measuring a healer as individual is hard since healing is a team effort and you only see the outcome of the team itself, no healing meters in the world would show you who is performing good and who is performing bad inside a healing team. By good I mean "right" and by bad I mean "wrong" rather. You can be terribly wrong with good healing throughput and delightfully right in doing choices even when having the least efficient heal per second.
Check this: viewtopic.php?f=41&t=28259 for more details (the comments).