Good idea, but the rest of the itinerary has enough 777 service for me, and it's not my favorite aircraft. A little more tweaking gets me to this: JNB-LHR-MCT-LHR-SYD-HKG-NRT-HKG-JFK-DFW-BOS-DFW-SJU-JFK-LAX-LHR-NBO at 60,241 BIS miles, or 6.4 cpm including COS and elite status bonuses. Have I maxed out? (Of course, now the challenge will be building this itinerary with flights which actually work in real life!!)