Dethklok is easily the weak link for me personally, although they are still pretty good. Machine Head and Black Dahlia are the main draws for me. How they would bill this would probably be kind of weird though. Clearly Dahlia would be opening and ATR would probably be headlining, but I have no clue who will second to last between Dethklok and Machine Head.
8/9 Summer Slaughter
9/28 Coheed and Cambria