I know in the 4lock 1priest setup most run priest as main and massover heal. With my 5x shaman I just use lesser healing wave, or chain heal. The lesser healing wave macros are each set with 5 keybindings with target=toonname... So when I press it that char gets 5 lesser healing waves. Then when I do chain heal I have target=player so all 5 chain heal based off themselves making it a group complete heal.