I currently have an account with AA, but will soon have 20k mile itinerary coming up on CX in M class (NYC-HKG-KTM), which earns me 0 miles with AA. (Going up to H for earning miles is an extra $400, not worth it this time around).

So the question is then, where should I get these miles banked? It would be my secondary FF account, so I don't expect to earn status, but would like to maximize long term benefits.

Search didn't find me anything, let me know if I missed it.