I would go with Grid + GridCustomLayouts + Clique for your healing.

You can be on any toon on your team.
And you can heal quite effectively, by clicking on the Grid frame.
The only thing you need really, is for the grid to be in the same position and the same order on everyone's screen.
My last link below, shows my custom setup... which is my toons in column one and the rest of the raid/battleground in the remaining columns.




Here's a video overview of Repeater Regions: http://isboxer.com/index.php/guides/...tovya-repeater
It is a little older, but shows the process quite well.

Here's a textual version of the same: http://isboxer.com/forum/viewtopic.php?f=21&t=3

And my current Grid/Custom Layout, which differs from the previous post: http://www.dual-boxing.com/threads/4...870#post347870



If you want a bit of a video demonstration of Grid based healing in action...
Click my stream in my signature, and check out any of the archived pvp videos.