TPE in PY is very cheap and has no advance purchase requirement, so that has other benefits (like waiting for an upgrade window). Two of those round-trips would be about 30k, so if you have 104 eUps sitting around, I think that's the cheapest and best option. TYO has some similarly priced PY fares, but it's fewer miles and I think there's an advance purchase requirement.
But with 5 days and no metal/dollar requirement, there must be some cheap *A J fare.
From a brief look at
https://www.google.com/flights#flt=Y...-350236099;t:e I would suggest looking at J fares to MCO/CUN/PTY.