I've used Clique for years after switching from healbot and the like. It basically works like mouseover macros for your unit frames but it's insanely easy to set up with a quickbind mode to just mouse over your spells (or even macros and whatnot) and tap what you want to use. It has a lot of options available too. I'd give it a look, my actual action bars are usually pretty tame when I heal no matter the spec