#showtooltip
/cast [@mouseover, help, nodead] Power Word: Shield; [@mouseover, harm, nodead][@target, harm, nodead]Purge the Wicked; [@target, help, nodead][@player] Shadow Mend
This casts PW:Shield at your mouse over if its friendly and alive, Purge at your mouse over or target if its enemy and alive, or Shadow Mend at your target if its alive or at yourself. You can replace spells where you need to, I have all of heals an dps abilities tied into macros like this.