You only have 3+3 which are not really aggressive, Some Consider it pre-Cancerous. The problem is you have 12 3+3 cores. If you have over six, that is considered something that you should treat even if it’s all 3+3.

Radiation would make a lot of sense. Five sessions of SBRT radiation could knock it out quickly. My brother had it done at 77 and it worked quite well for him. The only problem he had was some difficulty urinating, which was resolved by taking Flomax every other day.

Have you spoken to a radiation oncologist? You could consult with a couple of them, which you already seem to be planning on doing.

You could get a decipher test to see what your chance of reoccurrence is. If it was really low, you could still consider active surveillance.