I know that as a healer it gets pretty challenging to heal parties/raids and there was once an addon here that would assist with such a drawing duty. This Addon as the title suggests, was Grid Clique It. It, however, was removed from this website. I cannot find it anywhere so I was hoping to find it again or have it brought back. This addon made my life as a healer so much better. It really did its job, and did not take up half my screen. I am unaware of the reason it has been taken down but I sincerely hope that someone reads this and places it back here. It would be greatly appreciated.
It was removed due to being severely outdated -- You can contact the author here to update it. You could also grab the 'latest' version of it from the CurseForge site under Recent Files, but it is not guaranteed to work, as this addon has not been updated for quite a while.