First in the "e stage section" is Mysterious Ways (technically the band gets there for the end of EBTTRT) and last is Every Breaking Wave. Everything played between those two songs is played with the whole band on the e stage. It's usually 4 songs total, but there have been a couple of shows where it's been 5.
Bono will sometimes sing from the e stage during other songs though, so it gets more action throughout the show.