Recoil reduction, which JP combo is the way to go?

I have an M5 upper/lower in .308 w/ a 16" SOLGW CHF, and Riflespeed Adj GB. I'm running a SI flat wire spring with an Odin Adj buffer maxed out and it's rough but manageable. Noticed the flat wire is pushing the buffer forward against the buffer pin, and current BCG, so once the upper is closed you need to use a small tool to push the buffer back to get the upper and lower apart again.

Now I know JP is the way to go but my question is if I go with a Low Mass BCG do I get the Standard or H2 Silent Capture, and do I need to get the spring kit or just the Silent Capture? I feel the H2 would be better paired with a standard BCG, as the low mass would be too light, correct me if I'm wrong.

I have a similar 12.5" Other but basic also in .308. I just wanted something small and brutal. I only plan on using a Low mass and Silent Capture on this. No adj gas block and all Aero parts at present.