Is AS an option from your SPG stash?
If so, it's a very strong option for you here:
1) JL (searchable on AS website -- which of course you can then use to book with AA miles if needed)
2) KE via a few different places (with AS as the connection to LAX/SFO/YVR)
3) Hainan via PEK at 50k for J (though the random dates I searched only have J to PEK and then Y for the 5 hour flight to BKK)