There's a ton you can do with this, but it's all a tradeoff - you have to give in one area to gain in another. What is more important - miles, destinations, or F?

You can get 73,500 with these tweaks, but you may not like the destinations or less F. This is without even touching your NA segments which can definitely be optimized. Also, SWP segments aren't worthwhile if you want to maximize miles (you should add more NA segs) but I don't know if the SWP segments are places you really want to go.

JFK-eze-ccs-scl-gru-NRT-sin-nrt-SYD-AKL-BNE-MEL-LHR-dxb-hel-dxb-lon-MEX-DFW-YVR-JFK

What places MUST stay and how much true F do you require?