Whew! After hours of mind going in circles, hours on hold, learning about savory snacks such as peanuts on US Airways,rerouting, and agents saying to call on Mar 31, I finally got my last *A trip from USDM from North America to Asia booked at 11:15 pm EDT on 3/30.

MEX-PTY (long layover)
PTY-GIG (long layover)
GIG-LIS (long layover)
LIS-FRA (long layover)
FRA-BKK (Destination)
BKK-ADD (long layover)
ADD-FCO (stopover)
FCO-FRA (long layover)
FRA-MEX

5 continents, 8 countries...

Thank you guys for all the tips here! Could not have done w/o flyertalk.

And will miss you USDM!