That's not a bad spec, but I would change to the following:
http://www.torhead.com/skill-calc#701MffbzGoRzcZZGbMkM.1
What I took away:
Kolto Cloud - It's so situational, and really not energy efficient or time efficient. As an "oh crap" skill its quite lack-luster, considering it takes 15s to get the full effect of the heal. Most people are dead by then.
Sedatives - Honestly, you use Tranq so seldom when it REALLY matters (since both you and the mob have to be out of combat) which is useless for boss fights etc.
Survivors Scars - Which gives a 6% healing bonus (see explanation of what I added)
What I added:
Nothing terribly useful EXCEPT Street Tough, which IMO is HUGE for energy regen. It lowers the cooldown of pugnacity AND it adds an energy return component (free 10 energy) when activated.
For a bonus, you also get Shrap Bomb (which is great for metal-getting in PVP) and a CD on Dirty Kick (for when the tank forgets that little mob who desperately wants to be your friend).
With this build, you can spam MORE heals, which is why I feel its okay to sacrifice the 6% bonus and the mediocre AOE heal.