Dude, if you're going to be at Mayhem, you might as well just watch them. You're already gonna be there and you like the band so why not? I know this setlist might disappoint you, but I feel Mastodon are smart enough to throw in some older tunes. And I can guarantee that they'll keep Oblivion and Crack the Skye
4/20 Thou/Cloud Rat
4/26 Circle Takes The Square/Loma Prieta/leer.