WAW-LHR-MEL-AKL-HKG-DPS-NRT-SIN-NRT-MEX-YVR-JFK-MIA-LHR-MCT-LHR-WAW = 56,660 mi/84,900 EQP...
but fewer RDM than...
WAW-LHR-MEL-AKL-HKG-DPS-NRT-SIN-NRT-DFW-YVR-JFK-MIA-LHR-MCT-LHR-WAW (55,328 mi/82,992 EQP)...
since you won't get Plat/EXP bonuses on JL- or BA-numbered flights. In both cases you could use AA codes on (MIA)-LHR-MCT and on the second itinerary you could use the AA code on SIN-NRT if connecting to AA over the Pacific. Don't forget you could also use eVIPs if you have any on AA metal TPAC and TATL, thus scoring FC suites; IMO a great use of eVIPs on long flights.