I have some flights with MH later this year in addition to the KUL - HKG. The majority of flights are very short flights that are an hour or two in the air.

Does MH have any preferred seats reserved for OW elites that I can benefit from once check in opens? I have OW Sapphire status with AA and no status with BA. The fare class I have booked doesn't earn miles with AA but does with BA. Therefore I would like to add my BA number to the reservation but I won't benefit from any preferred seats if I do so.

I plan on showing my AA membership card at check in to use the J check in counters and for lounge access.

Alternatively, I could put my AA number on the reservation and then submit a missing mileage request to BA after travel is complete for the miles I would earn. Of course, that involves having to chase BA to have the miles credited to my account.

Not sure which FF number is best to put on my reservation.