You could use a Post It note, stuck to the side of your monitor.
Click Bars have a graphic, which can be whatever... could use one purely for the notification of what click = what heal.

I basically did a bunch of runs, and only had the mouse clicks for healing.
If you run with one healer type and are consistent, it's a lot easier then Priest on one team, Druid on another, Shammies on another...

You can go with the approach:
- Alt + Left = HoT
- Alt + Right = Fast Heal
- Ctrl + Left = Special
- Ctrl + Right = Big Heal
And then set up multiple types of healers using the same philosophy.

In the end, whatever works best for you.




Not sure on the Soul Fire proc.