I run 5 healing macros on F1-F5 so that I can single heal each ret. (Only the rets cast heal, if your tank does he has NO avoidance and will get the crap beat out of him). Works pretty well, and then I have the EveryoneHealYourselfButton as well as the BigEveryoneHealYourselfButton. Of course none of those require the tank to cast.