Thank you Les...I'm starting to do that dance now. I might hit you up for more info in the future.
I have started asking every (older) shooter I see with glasses what works for them. Unfortunately, the answers are as varied as the quest you outlined.
The last guy did have the "reading" portion moved up a bit in the lens to maintain head position for pistol sights.
I might pursue the dominant eye-close RX, non-dominant-far RX route.
It would help if I had a bunch of money laying around....that Powerball lottery plan hasn't panned out.