I run with and am working towards a similar build, a 24/17/0.
I'm only level 37 at the moment on my merc, but this is the build I'm working towards and I use it for leveling and pvp.
http://www.torhead.com/skill-calc#300rfRoRzcdzZrIkbR.1
The knockback from rocket punch I couldn't live without in pvp, specially since pre 50 you get huttball 90% of the time. When they introduce the dual spec, or when I hit 50 I'll probably go pure Bodyguard, as I want to primarily heal. For now tho this works great for me. Might look into removing Integrated Systems and putting 2 into Powered Insulators or Jet Escape.
Originally I went pure healer spec, but I found leveling and pvp to be horrible as I couldn't put out enough damage or defend myself very well. So adding tracker missile and the extended knockback for jet boost and knockback for rocket punch really helps. Specially in Huttball.