I know it's probably a lazy way of doing it, but I use a macro.
Code:
#showtooltip
/console autoUnshift 0
/cast [target=targettarget,help,nodead] Healing Touch; [@player] Healing Touch
/console autoUnshift 1
Code:
#showtooltip
/cast [target=targettarget,help,nodead] Rejuvenation; [@player] Rejuvenation
Both just cast the heal on the targets target, 99.9999% of the time it's the tank and heals them, because I always have DoC, it heals me too. I then use pawkets weakaura set, with a mod that tracks the remaning time as a bar.
http://pastebin.com/y7Zey604
I'm sure there are better ways of doing this, using mouseovers for instance, but Im just simply to lazy to do it this way.