I leveled up my pal + 4 ele sham group from level 10+ all together (no boosting) and I never ended up respeccing one as Resto, 4x lesser healing wave is very effcient, quick and has been plenty to keep my tank alive through normal and heroic instances FWIW.

At this point in a mix of S2 and badge gear I am starting to 4box the easier heroics (want trinketses for the sham, left the paladin out just to spice things up), again no resto spec