I know it's kind of rhetorical question, because it depends on someone's needs which program is the best, but my priorities are:
- miles valid more than 3 years (would be the best if they never expire)
- lot of miles from kind of competitions, newsletters, surveys, etc.
- at least 50% miles from BA World Traveller class.

The thing is, I usually fly *A, will fly oneworld very random but after few years want to redeem miles for some flight.

I think about CX Asia Miles program....are there any better options?