Tokyo Mirage Sessions FE Encore. Though I'm not sure if I'll wait until a price drop. Did the WiiU version ever get a price drop?
Probably not, because it was a small printrun to begin with and digital discounts for Nintendo games were rare, that goes even moreso for a game released so late in the lifecycle.
The chances for a digital discount on Switch are realistic, but will of course be limited to the usual occasions where Nintendo issues discounts: Easter, Black Friday/Cyber Monday, Christmas, New Year. 2020's Easter is out of the question because it's too soon.