I wanted to come back and say thank you to everybody for all the valueable inputs! ^
After hours on the phone with M&M I have finally suceeded to book our award flights on the dates as planned.
We will split up and fly two different routes, arriving within 12 hours of each other:
Mrs. Goliath and me:
LX338 ZHR-LHR
NZ38 LHR-(HKG-)AKL
NZ39 AKL-HKG (Stopover)
NZ39 HKG-LHR
LX325 LHR-ZRH
Our friends:
LH3721 ZRH-FRA
SQ25 FRA-SIN
SQ281 SIN-AKL
SQ298 CHC-SIN
SQ26 SIN-FRA
LH3720 FRA-ZRH