Ubers Z-celebrate Ho-oh. I'm fairly certain you've never used z Ho-oh. Roost + pressure (celebrate requires pressure) stalls out rock coverage reliably, stab can sweep most teams mid to late game. This team has not been tested high ladder so use caution, you may prefer using it in a laid back live with a low-mid ladder account https://pokepast.es/2f7697bc6de9a213
This is a team I have been using and have been doing well. Scarf Exploud is fun, EVed to beat non-Scarf Arcanine and Haxorus. The rest of the team is still subject to change over the next week before the tournament but I am really liking the format! I'm def putting ALOT of responsibility on Uxie lol but Uxie is crazy reliable, esp with there being few Taunters