Zacian it's pretty much your standard set I mean you could swap wild charge for crunch to deal with Necrozma Dusk Mane or you can just keep wow charged to deal with things like Kyogre really pick your poison at this point.
Yveltal gives you a nice defogger and decent bulk. As well as sucker Punch for things like Shadow calyrex. And I also added taunt for things that want to set up or throw down rocks or spikes. And knock off is always good when you're expecting a switch and sucker Punch won't work.
it's namely hyper offensive... But it does have some defensive aspects to it. It could also work for Gen 8 if you take the Red orb off of Groudon.
The reason I want focus sash on mega Rayquaza was one guaranteed Dragon dance but you do have to be careful for things like triple axle..