Originally Posted by
VegasGambler
Apply for Citi AA cards and use your AS miles to fly to Asia and your AA miles to fly back.
The differential for AS and AA prices for J/F isn't TOO big out of Japan/Asia 1 (like 10k miles or thereabouts), but SE Asia/Asia 2 is pretty brutal for F redemptions (110k on AA vs. 70/75k on AS), though J is only 5-20k miles or so. If OP is getting all their miles with credit card apps, may take a bit longer if they want to live it up with Dom or Krug in a fancy F seat.
The other advantage of AA miles over AS miles is being able to mix partners, like, say, JL on SIN-NRT-ORD and AA ORD-YYZ (which would be two awards on AS- you can only mix AS + one partner on a one way itinerary, and AS doesn't fly to YYZ, so you're stuck with CX or a positioning flight).