And for OP:
It depends on the tickets you are trying to redeem for.

For short flights in Asia, BA's Avios is good.

You can use it book flights on CX, often at less miles than Asia Miles.

e.g. 9,000 miles roundtrip from Hong Kong to Taipei.
20,000 miles roundtrip from Hong Kong to Tokyo.

( 2x miles for Biz, 3x for First )