Here's a crazy and impractical idea, but worth putting it out there since you mentioned you are looking for intra-Asia redemptions.

BA's paid J fares earn handsomely on Alaska ( 'I' fare commonly found earns 250%).

So one DEL-LHR-DEN roundtrip could net you about 45k miles right off the bat.

You could then use those miles to book intra-Asia redemptions on JAL. Economy roundtrip costs 30k and Business roundtrip costs 50k.
One-way are allowed at half the price.

The caveat (or opportunity depending on how you look at it) is that you have to route through Japan, or more accurately, your first flight has to be DEL-NRT as that is the sole flight JAL has out of India.

On the upside, you can have a stopover in Japan even on one-way tickets.

As I said, this may not be for everyone, but worth a reminder to those who can benefit.