Castrate Resistant on Orgovyx, What's next?

[Startech]

My Psa sky rocketed the last 90 days from 0.48 to 2.54 while my Testosterone lowered slightly from 11.8 to 11.4. I think this is a clear sign of castrate resistance. Last scan 6 months ago showed slight uptake along the Vas Deferens on one side. Not sure if MO will do another scan, but at the last visit he said we could do Nubeqa, Xtandi or Zytiga next. What seems to be the popular way to go and is there something else I should ask the MO about. My best to you all, Thank you.