The one time we got this to work in a random PUG. A mara cast predation when we dropped and I used infiltrate so that three of us we could sneak past to almost midway on grass without drawing attention

Heal spec - Considered one of the best in PVP DPS spec - Considered mediocre to laughable in both PVP and PVE I started out with the Concealment spec as I wanted to try out a DPS character. I was disappointed with the actual damage put out by the character. It seemed like I would need to spec all the way to Acid Blade to get some good numbers out, but the general consensus I read on the forums was that Operatives weren't the best DPS option anyway. My first character was a Jedi Sage (Seer) so I went fell back on what was familiar and switched to the heal spec. I'm definitely enjoying the heal spec. It's offers a lot more mobility than the Seer as I have more abilities that I can cast on the run. The extra mobility and two additional defensive CDs make survivalibility better. The healing output isn't as good as the Seer, but having Shield Probe costing no energy and procing TA makes the spec viable.

Definitely need to cast rejuvenate before your regular rotation as mentioned here. Conveyance is a huge boost to your healing.

I find Salvation to be a great tool in PVP. Very often you'll find a big group of allies grouped together around the WZ objectives and Salvation is perfect for those situations. One other thing to note is that your teammates will recognize the fact that you have cast Salvation and gravitate towards the area of its effect. In the PVE (I'm assuming you are talking about PVE in your post) situation you are describing, your group just needs to be aware of the range of Salvation. You can all arrange yourselves so that you can cast Salvation at the midpoint between your tank and the rest of your group.