TG has a 77W (9W wet-lease) which flies HND-BKK. There is also the TG A380 which flies HKG-BKK. Both of those should be pretty nice and you can try for F rather than C since you're already on an F award. I also think that NRT-SIN on SQ is a decent config plane but I'm positive on that, plus getting those seats as a partner award is much harder.