RTW plotting (DAS13/DONE3). Suggestions needed.
 

Trying to work out my trip plans for this year. Currently have the following:

DAS13: CBR-SYD-HND-DONE3-ITM-HND-SIN-MEL-CBR (or –HND/NRT-TPE-HKG-SIN-)
DONE3: NRT-JFK-Side1-DFW-PDX-LAX-DCA-ORD-Side2-LAX-DOH-OSL or CPH-LHR-DXB-LHR-ICN-HKG-SIN-HND
Side trips: JFK-BOS-JFK-NRT-JFK, ORD-DTW-ORD

Connecting right from QF25 (SYD-HND) to JL6 (NRT-JFK).
Stops in Boston/Manchester NH, New York, Tokyo, Dallas, Portland, DC, Detroit, Oslo or Copenhagen, Seoul and Osaka or Taipei with day stops in London and Dubai.

Trying to find a way to avoid needing one or more of the short US extra flights (JFK-BOS-JFK, ORD-DTW-ORD).
Looked at stopping at PHL instead of DC then flying to DTW (thus avoiding the small no F RJs on DCA-DTW), but then there’s no DTW-LAX :(
Looked at going to BOS instead of JFK on the DONE3 and travel BOS-JFK-NRT-BOS for the side trip back to Tokyo and the NYC stop, but internet refuses to price up an open jaw in JL premium economy.

Any suggestions?