I had a DECIPHER done on 9-12-2018. My risk was even higher than yours: 1.0. 5-year risk of metastasis was 52.6%. Still survival at 10-year was 70%. Remember there are still numbers. I got ADT and Radiation Therapy. I have a very aggressive cancer. I would suggest that you go for radiation for sure. Get ready for side-effects. ALL cancer treatment cause them. I still wear a pad 5 years removed from surgery and radiation. But I feel good. And I can see my kids and wife, friends and family. Wish you the best.