2017 RT Installing Rear Shock Question

On my 2017 RT SE6, (No Compressor), because I didn't know any better, I don't know if that air damper ever worked. Not long after I purchased the bike new, the rear would bottom out fairly easy. I never gave that schrader valve a thought, to check the air pressure, etc. All I know is that as of a few months ago, it wouldn't hold pressure for more than a day or so. Charge up to say 50psi, and not to long after that it was at Zero. I plan on replacing the rear shock with a Stage 2 Elka. Do I still need to do something with that air damper, or is that shock absorber sufficient to get the job done?