Good ideas, thanks!

The way I have it as of last night is, the spam button cycles through a LHW on the tank every three-ish seconds, then Riptides and Chain Heals a mage. I also have five buttons to cast Greater Healing Wave on each party member ...

I guess what I need to do is remove the Chain Heal from the spam sequence, and change the Greater Healing Wave buttons 2-5 to do Chain Heal instead? I like to do as little direct healing as possible but it seems like this will strike a decent balance between overhealing the party at the tank's expense, and having to pay too much attention to pressing healing buttons.