Best closers ive seen are Within My Blood by Skeletontits and Chant for Eschaton 2000 by Behemoth.
The first thing that comes to mind for openers isn't a real opener, but they usually play it 2nd - Nile's Sacrifice Unto Sebek.
07/22 - Melt-Banana
07/26 - Forever Came Calling & Primitive Man
07/30 - Warped (?)
08/05 - Knockout Kid
08/07 - Fireworks (?)