So my options now are either:

MRU-LHR-AUH-LHR-IST-LHR-MIA-JFK-YVR-SFO-DTW-DFW-LAS//LAX-SYD//CBR-PER-MEL-AKL-SYD-JNB-MRU

OR

MRU-LHR-MCT-AUH-MCT-LHR-MIA-JFK-YVR-SFO-DTW-DFW-LAS//LAX-SYD//CBR-PER-MEL-AKL-SYD-JNB-MRU

OR rearranging the N.American bit becomes:

MRU-LHR-MCT-AUH-MCT-LHR-MIA-DFW-DTW-SFO//LAX-DFW-JFK-YVR-SYD//CBR-PER-MEL-AKL-SYD-JNB-MRU

I actually prefer missing the Istanbul section as I was there a few weeks ago and don't want to spend more time than needed in Europe region. Lastly, are we sure about the LHR-MCT-AUH-MCT-LHR counts as 4 full segments. Can I spend a couple of days in ACT and a couple of days in AUH or to earn the credit (360 per leg, so 1440 for LHR-MCT-AUH-MCT-LHR) I need to NOT spend anytime there?