All interesting options, but, I think the opening song can come out of left field. What if Come Alive was the opening song, remember when no one was expecting Iconic to open the RH tour and it did? That said I think the best MX track to open could be God Control, because Batuka is too much of a call-response song to open the tour. The closing song could be Faz Gostoso and end it with a bang, the song is a good representation of MX, instrumentally, bilingual, and upbeat.
I'll keep my fingers crossed for a Disco section with: God Control, Hung Up, Deeper and Deeper and IDSIF. A gay boy can only dream!