How would you run 5 druids for PvE?

1 Bear
3 x Boomkins
1 Resto?

What is the benefit for multiple moomkins? Do their aura's satck? It seems that it makes sense to make 1 and then maybe spec two others balance but not in moonkin form so they can spot heal. That seems to make more sense.

Or maybe...
1 Bear
2 x Boomkins
2 x Resto