The tour setlist really depends on the theme of the album.
From The Fame, drop everything from TF but PF, let Gaga make the audience thirst for it.
From The Fame Monster, drop Telephone (she's tired of that song

) and keep BR and Alejandro and add Monster since the album is #Monster4Life so it kinda fit
From BTW, just keep Born This Way but this time with the studio version and make TEOG the piano one with Y&I, drop Judas and find away to make MTN ha comeback

From ARTPOP, keep Applause, Venus, and Gypsy (seems unlikely), Dope will always be there for the piano segment.