So this team is really, really bad, but I've had a lot of fun with it. Aurora Veil + dual dance Tectonic Rage Haxorus is a pretty great time.
http://pokepast.es/2fdee674af3d6240
+2 Tectonic Rage can usually OHKO Fini, guaranteed after rocks. If you want it to be guaranteed, you can switch it to adamant, but then it gets outsped by scarf lele and lando and shit. So yeah, Haxorus' nature is up to each player I suppose.