You can sign up for NW WP using an American or Asian address. If you don't konw anyone in either place then just search on the internet and make one up. Wait until sometime in the future and tell them you moved to India to get the address changed.

As for the other plans. KE isn't particulary good unless you're a VERY frequent KE flyer. Their status that includes elite plus is a lifetime status that has a pretty high qualification level, its not anual like most other programs.

The US based progrmas have the best bonuses if you are elite. The Elite bonuses for US programs are much higher than elite bonuses in the foreign plans (if the other plans have an elite bonus at all).

Other than that, most other plans are similar for busniess class flyers with a 150% credit for C, J, Z (typically), and maybe even R (depending on program).

Elite plus qualification in most progrmas is 50,000 miles or the KM equivilent (except the american programs). OK gives free space available upgrades to their elites (incuding TATL).