Please do not make any healbot based Addon. in my honest opinion thistype of addon made healing a joke click-win function.
I healed a server first competent guild in progression from bc-wotlk and i HATED seeing this addon used. if you as a healer are not competent enough to cycle heals watch debuffs and keep your raid up you should NOT be healing. its that simple, a addon should not give you the ability to click for purps.
This post after a heated argument by a "healer" that was complaining about it being to hard to keep 5 people up and he use to be a raid healer that ect ect ect. you can fill in the rest simply he was unable to heal because he was crippled by the use of this type of addon. Or it augmented his inability to heal with software needs. and i am strongly against this.