This build is very similar to my 7/6/2 stat PvP build except I used the 3% DTE mods with firearms that were available at the weekly vendor reset. I mainly use this build now for legendary missions, incurisons, and some challenging ones like Russian Consulate, where elite enemies are more common.
I use defib instead of booster for the revives mainly, but booster would be a good alternative due to the buffs it grants. The immuniser goes without saying as it's mainly for the overheal or extra heal on detonation, not for using it as a healing box, per se. Recovery link serves the same purpose for revives, just as the defib.
As for the talents, On the Move and Critical Save are pretty much self explanatory. Precision is here due to the lack of skill power, so I run that instead of a weak pulse. As for Combat Medic, this talent is usually preferable for groups as you can heal your teammates and their skills as well, which is very powerful.
NOTE: The build used in the video features a Centurion with Predatory instead of the Double Barrel Sawed Off Shotgun.