What better than the title track off the new album followed by The New Order. They are closing the set with 'Formation of Damnation' but I think it's a perfect opener. A perfect song to close the set is Into The Pit!
Other killer openers would be:
First Strike Still Deadly
The Persecuted (they have done this a few times - really cool)
Eerie Inhabitants (fuckin awesome song!)
Raging Waters (the devil's triangle!!!!!!!!!!)