jcmurray since you don't care that much for more than 7000 nTPs, then you can possibly do this one
OSL-LHR on BA
LHR-DOH on QR
DOH-LAX on QR
LAX-NRT on JL
NRT-DOH on QR
DOH-OSL on QR

It's priced at £4,358.36 and will award you more than 13000 nTPs. Achievable in even 5 days