As the title says, I'm still trying to decide between a shammy or druid healer.
Shammy gives out strong direct heals vs the druids capability to heal on the move.

I've already got a bear and ele sham in my team, so buffs are mostly covered.
I would pick up another replenishment (next to lock) with the tree, and I would have a 2nd water totem for Healing stream totem with resist glyph with a shammy.