I'm almost done my first mini rtw that includes an LH F segment ex EU.
IAD-NRT (NH F, overnight in TYO)
HND-BKK (TG F, Destination)
BKK-FRA (TG F, STOP)
FRA-ORD (LH F)
ORD-IAD (UA Y) Will skip this segment.
Total taxes/fees were just over 1k CAD for 1 PAX. The last time in flew LH F was back in 2015, MUC-YVR. It looks like YQ was only 300 or so on that flight.