That's a real tough question. Thinking back 10 years with what I know now, I know I had more than one pain source and a multitude of issues.
Nothing they offered really did anything for my prostate. Gotta tell you, though, it wasn't the focus of my urologists. Though never said explicitly, I'm pretty sure my reversal uro KNEW right away I needed a reversal but put me through the non-invasive therapies (nerve pain meds, injections, etc.) as almost a prerequisite. I think he knew the prostate problems would go away, but he never explicitly confirmed the autoimmune part. I think that belief is almost heresy even among the uro's that believe PVP exists.
Short of reversal, I'd bet on T-therapy as your best bet.
Remember, I learned after my reversal that I was leaking from both vas tips and had granulomas on both ends. That means that instead of back pressure and blow-outs, my sperm found a way to push through the cauterized vas tip. I think that means my body effectively converted a closed-end to an open-end vasectomy.
I say this because I think our situations are similar (I also had/have nerve pain, not sure if you do).
Nothing for 9 months solved my pains and symptoms I believe are attributable to leaking sperm into the open except being put back together. Again, one data point for you, but I think you now know my recommendation (based solely on my experience).