Starbuckjones had a thread from quite a ways back.
A full druid team, I believe.

He had click running a Lifebloom on each of the druids.
I believe there was a Lifebloom from each of the druids on the tank toon.
So each ran 1x on themself and the tank had 1x from each of the others.

The thread mentioned it was quite mana intensive.
But still you could do that for a boss fight or something.
Not sure that you wouldn't be better served with a dedicated healer, if you needed that much group healing.

Still, everyone has their own set up.