Just wondering what are good options for multiple leg business flights leaving from London when it comes to getting TPs.

Qatar routes are obviously the main candidates as a return business flight to anywhere in Asia will get you 140 x 4 TP which puts you very close to BAEC Silver. Prices are currently high due to World Cup but hopefully can bag an offer in the future.

Any other come to mind? (Cathay maybe or a JAL flight to Japan and then jump south?)

Asking this as I know some regions are not properly serviced. I remember checking for Japan and Qatar was not the best option given their schedule.