Has anyone else been diagnosed with aggressive low-PSA prostate cancer?

I was diagnosed in February with stage four oligometastatic prostate cancer, a Gleason score of 8, but only one lesion outside the prostate, at the time of the telling MRI my PSA was 1.4, six weeks later it was 1.2, Urologist says it's a one in a thousand case, very aggressive cancer that produces very little PSA, I was seeing the Urologist annually because of another issue and he always did the DRE, that's when he discovered a lesion on the prostate, the lesion on my iliac bone has been successfully radiated, I've been on ADT therapy along with abiraterone and Prednisone for three months, my PSA is down to .21 and my testosterone is at 7, so far no pain at all, the general consensus from my "team" is ill be lucky to make five years, I've changed my diet and I adopted a vigorous exercise routine, I'm taking meds to counter the emotional jags of no testosterone and a sleep aid because I wasn't sleeping but 2 or 3 hours and some nights none at all. After much debate they have agreed to radiation for my prostate, I know there are risks but I'm at Dartmouth Hitchcock medical center, it's a top notch NCI rated facility, honestly it's really about revenge for me, I want to kill the crap that's killing me, it sounds silly but that's how I feel. Anyone had a similar diagnosis?