I obviously needed to think of a God first. Things like Hoopa-Unbound, Kyurem-White, Landorus, and Kyogre first came to mind, but then I chose Deoxys-A since its high attacking stats, good speed, and leading ability was useful to the team. It'll be keeping its special defense stat.
One of Deoxys-A's biggest flaws is that it has horrid defenses. 50 HP and 20 in each defensive stat sucks, so you have to make up for that. What better way to do so than to put a Pokemon that isn't affected by a stat change at all? Rotom-W always has 50 HP and its STAB proved to be useful.
Talonflame is an obvious choice for the attack stat. It's impossible to pass up the opportunity of 180 attack priority spammer. It also kills grass types that may otherwise threaten the team, even if there is only one viable grass type off the top of my head.
I feel bad for poor Weavile since it has such low defense. Lower defense won't matter, then! Weavile also retains nice offensive presence, decent priority, and two amazing STAB moves.
A rock type/ground type weakness was very noticeable. If Rotom-W had died, nothing could beat those suckers, and even then, there's such a thing as weather boosted mons or speed boosted mons, so second counter is needed, and as you can see, it's Serperior. Serperior had two problems in OU: Horrendous special attack and bad coverage. Its shitty special attack is increased to 180, and that (somewhat) neutralizes its coverage needs. Very powerful.
When choosing the speed slot, one Pokemon stood out to me (every Pokemon did, but you get the point): Mega Heracross. With 150 speed it could fix its speed problems and destroy everything in its path with its unboosted 180 attack. It's absolutely perfect for the speed slot.
There was a huge weakness to Talonflame, obviously. Nothing could beat it. Not even Rotom-W, who loses to most of its teammates. Therefore, a surefire counter was needed. And the Pokemon that was the best counter was Rhydon! Rhydon (which was Rhyperior, but Eviolite is being suspected for an unban so obvious option Rhydon) is probably Talonflame's best counter, and because Talonflame may switch out to avoid Rhydon, the teammates can take care of them. You'd be surprised how amazing Rhydon is outside of countering Talonflame, too. Its speed is amazing in the speed slot, it has amazing bulk (especially with Eviolite), nice attack, and Swords Dance. This thing is just amazing.
Yes, Diancie is Mega, by the way. Anyway, Rotom-W was proving to be somewhat mediocre after playing a bit on the ladder, so I switched it out for Diancie-Mega! Higher speed (though Rotom-W was scarf so Rotom-W is the winner of that), Magic Bounce, good mixed attacking stats, and so many more things. It also can take quite a few attacks, even with 50/110/110 defenses.
Last improvement. Weavile was also proving to be mediocre, and there was only one replacement for this off the top of my head.: Another goddamned special attacker--- I mean Alakazam. It doesn't mind that it has now 20 defense since it'll die to many physical attacks (and it has Sash obviously so it doesn't even matter), and in general, it's just the perfect replacement due to its coverage, speed, and Special Attack.