Welcome to FT. I would suggest starting from the UK instead of MRU since LONEx fares are usually the cheapest country. Not worth the hassle factor to begin from MRU (unless you want to go there) for an economy class ticket.

LHR-DOH,CAI-MAD-(x)SCL-IPC-SCL-AKL-SYD-CNS-NRT-HKG-PEK,DEL-HKG-JNB-VFA-JNB is only 15 FLIGHT segments giving you 5 more to use. Perhaps in Asia or Africa.