Would it be stupid of me to even think about requesting the following DC redemption for 50k return (part cash part miles) in F?

Overall:
LIS to MLE return (Z2 to Z10)

Out: LIS -(LX C Class) - ZRH - (LX F Class) - PVG - (SQ F Class) - SIN - (SQ C Class) - MLE

Back: MLE - (SQ C Class) - SIN - (SQ/TG C Class) - BKK - (TG F Class) - LHR - (TP C Class) - LIS

Not a problem if they insist BKK-LIS route needs to go via a city in Z2 but I just don't want to embarrass myself by asking 4 sectors for each one-way and protentially being declined for going via PVG (instead of BKK)... I just want to try SQ's F class in the trip even though it's on an old 772!