Originally Posted by
blueslip
It looks like money is not a factor for you to earn EP this year. With that being said, you may consider flying DFW-JFK-NRT-SIN or DFW-JFK-NRT-SGN before the year ends. The DFW-JFK-NRT alone yields 16272 miles but sometimes adding a segment to SGN or SIN lowers the total fare and more BIS miles. Be aware though that during holidays fares are usually higher.
I checked a few fares out of DFW, AUS and SAT - to NRT, FRA, LHR - they were not low. Checked some transcons as well. Saw nothing that I would consider "cheap". But hopefully OP has some $ and flexibility to get the job done.

GL!