I would just go for a moonkin spec, perhaps focusing more on mana regen talents. Healing output is fine for the tasks you would end up doing healingwise.
If you need to go truly hybrid then spec for whatever needs your group has.
Base hybrid Something in the lines of this & then you can place last 11 points depending on what you want to focus more on.
I could imagine ending up with something like this :
Healing heavy or
Dps focused
Just healing with a simple Rejuv+Nourish strategy, adding lifeblooms as you please.