Hopefully the Zytiga and Lupron will shrink your mets, and PSA will come down. There are some clinical trials you can start looking into. There are links to them at the end of the following article:
/pcnrv.blogspot.com/2017/06/newly-diagnosed-metastatic-m1-but-still.htmlProstate radiation or surgery is also an option that some are experimenting with after mets have been discovered.