I have a similar question , but to Thailand.
looking always for 4 seats on the same plane award availability is not easy.
But I still could get
ZRH-BKK on LX A340 in business
VIE-BKK on OS ( I think also A340 ) in business
FRA-BKK on LH ( in DEC. I think a old seated 747 ) in business
I know the new LH C from many flights between MUC-BKK, but they stop serving this route, so they are no longer available.
The best option would be new F / C on TG ex FRA or MUC, but they have never more than 2 seats each class available on each plane. Or C class via CPH/ARN ( which is F cabin ) , but also never available.
return I have so far F class on LH HKG-MUC.
My points are:
1.) Hit my desired dates out 20.DEC. in 06. JAN.
2.) nightflights with flatbed
3.) Not to many connections, and if dayflight an IFE
Iam not behind gourmet meals or champagne, so thatīs not so important.