I never thought of putting the heals on the same button as the dps macro. I figured it would be over used and the healer would go OOM. But I'm going to try it, hows this macro for it?

/target focustarget
/cast [help] Flash of Light;[target=targettarget,help] Flash of Light;[target=focus,help] Flash of Light

I wish there was a % health conditional.

I was also thinking about how to do mouseover heals from the tank. Maybe this would remove the need to have seperate heal buttons for each party member or change targets to heal someone. On the tank it would be /clearfocus;/focus [mouseover,help]. On the healer it would be /cast [target=focusfocus,help] Flash of Light. It would have to be spammed 2 or 3 times due to lag. Think this macro would work?