Bangkok is very well-served by One World carriers: Qantas, BA, JAL, Finnair, Sri Lankan, Qatar, Cathay, China Eastern and probably some I forgot. It’s not too bad getting redemption flights to Europe, North America via Hong Kong or Japan ( and taxes /fees on CX and JAL are reasonable ). On the other hand Qantas is stingy as hell when it comes to QF23/24 Sydney flights ( at least in J, and charge a lot in fees even in Y...about 1/3 of the price Of a discounted ticket)...they try to push everyone onto Jetstar via Melbourne ( ie an insanely overpriced J redemption ticket).
I keep O/W emerald through Qantas ( mostly for credit card spend) but credit points in excess of the yearly STatus Credit requirement to Alaska ( which offers quite good redemptions ex BKK).
My way of doing it maybe a bit dumb because I have LT something in QF ( Gold I think, meaning O/W Saphhire), and it would be smarter to credit to BA or Alaska or AA, but I never get around to it).
I’m definitely over Thai, a couple of booked flights and then a redemption flight and it’s on to Turkish .