You haven't tried healing from the party/hp display panel? That's the easiest method by far from what I've seen. You can move that character pane around too, just can't make it larger last I checked. You may even be able to scroll up and down with arrow keys or with gamepad but not 100% sure on that.

Just make a few macros for each heal you slot like:

/ac "Cure II" <st>

That'll bring up the selection icon, but then just click on the person's name/hp you want to heal and you auto-face your target(bigger deal with thm aoe heals) and start casting in the same click.