The old Dreamstate spec is pretty decent.
Balance down to Moonkin.
Resto down to Swiftmend.

You have fairly good healing power.
It was considered to be a healer spec.

You don't have to go moonkin, but that's an option.
The team will have the crit, with or without boomkin.

You'll have decent pew-pew ability too.

Just lacking on the AoE heals, no Wild Growth.