My PvE team is Warrior (main), Priest and Warlock.

I use the numpad for Shield, Flash Heal and Heal for all three.

But for "all day pve" healing I use Clique and arranged all Unitfrarmes on the left side of my right screen (main is on the left screen)

Mouse 1 - Renew
Mouse 3 - Flash Heal
Mouse 4 - Heal
Mouse Wheel - Shield


In PvP it does not work that good.