Thanks so much GenevaFlyer,
Guess I'll concentrate my foreign travel on *A as you suggested. Which FFP do you advise for domestic flights (BOS - SFO, DFW, MIA) and RN points - DL or AA? I checked ITA and SkyScanner and seems like they both have pretty much same flights from BOS. Get both?
Is it fine if I associate my SPG AmEx with RN for DL or AA, I won't be loosing on anything, right?
Any other "moves" I should consider to maximize my miles?
Best,
hihik