Hell i haven't even figured out how to non cast sequence heal yet. Now my gf is boxing now, I have to learn how to heal. Healing rain only heals so much you know.
I apologise if I am telling you how to suck eggs...

Here's one method: http://isboxer.com/index.php/videos/...ual-box-healer

My preferred method: http://www.dual-boxing.com/threads/33614-ISBoxer-Click-Healing-without-addons-(IMAGES-ADDED-by-REQ)

There are a bunch of other options here in the WoW section: http://isboxer.com/index.php/guides