I don't believe B&S has a standard "closer". On the last tour it was Get Me Away From Here I'm Dying.
I don't think we have any definitive ideawhat their set is going to be like. With a new album, it'll probably be pretty heavy on that. At Merriweather, summer 2013, which was further from an album release, there was really only 2-3 from IYFS and 4ish from TBWTAS. Don't think anything off Tigermilk got played. I'd expect this tour to be very new album heavy.