This was taken from my previous post
In the pve mb i had, prot warrior, fire magex2, shadow priest, holy pally, my main healing buttons were numpad 9, 6, 3, . , and 0. the mages would have decurse and the shadow priest would have dispel magic on the same buttons for the toon getting healed. This way they were always trying to decurse/dispel the toon getting healed as long as they were not casting. Some times you would have to jump and break dps if the debuff was that important. Kind of a simple fix without getting into complicated macros.

For The Horde!
--Pure Hairy