5 druids is working out for me even if they are low levels. The binifit of having 5 boomkin is that you can go to a Bear, 3 Boomkin, Tree setup and run any five man instance you want. With the new swipe you can hold AOE agro and drop AOE damage and focus fire large pulls down. Additionally, with the new rez that druids got, you can rez normally and you have 5 combat rez's to deal out in emergency's. I am still trying to decide what the best way to macro this is, but any one of the DPS could cast it or the healer.

Essentially you have 4 battle rez's at any time, 5 major armored DPSers for questing, a true tank and healer for instances, and cheap transportation until epic flight form and cold weather flying. Right now as far as I am concerned they are most likely one of the better multi-box PVE combos.

5 bears dancing in a circle FTW. Good luck with your Doomkin box.