Take a look at Repeater Region based heals.. probably a lot stronger then using the Keyboard.

Here are a couple of videos:
- By Tovya: http://isboxer.com/index.php/guides/33-wow-video-tovya-repeater
- By Zanthor: http://isboxer.com/index.php/videos/...or-healing-101

You basically need an addon like Vuhdo, Healbot or Grid.
And to display alphabetically.
So the top frame is the same toon on every screen, as is the bottom, etc.

Here's a written guide for the same: http://isboxer.com/index.php/guides/...lique-repeater