Can anyone help me get up to 20500 EQM on one return flight in W class or above from KIX?

I have some GPUs and RPUs and want to try the p.s. service so thinking that one leg would go KIX-SFO-JFK (or reverse), but a simple return doesn't get me up to the 20500 EQM I need for this MR. And no flights out of JFK to other airprts right? Open jaw from Newark perhaps??

Being based in Japan means I am not too good with planning US MRs. Any help/advice greatly appreciated! Many thanks.