I love Mastodon but can see them struggling on Mayhem Fest. Its hard for their music to whip the crowd into a frenzy like heavier bands such as Bodom, MH & Amon does before they go on. They don't have much in the way of stage production like Zombie or FFDP. Mastodon is not a good fit for this tour. They were excellent on the tour with Opeth/Ghost & Dethklok/High On Fire back in 09. They are much better headlining a club.
1-13 Philip H. Anselmo & The Illegals