I'll give you a hint...it's fine :)
Coverage-wise, you seem to have everything in place. Greninja can wipe out or threaten most checks and counters to your teammates. I'd have to say only one type would give you trouble: Ghost. However, shedding light on Aegislash's and Mega-Gengar's bans, I think you should be doing alright with those. Ferrothorn and Sylveon do a great job of successfully walling them and whittling their health away. All in all, nice synergy and it looks like a seriously good hyper-offensive team!
Just a few possible suggestions:
Just quickly on Gengar. Consider
Taunt over
Destiny Bond, DB is absolutely amazing but at the same time Taunt easily can destroy setups like Conkeldurr, Charizard-Mega-X, Scizor, Dragonite, et al. It's a great setup stopper, plus Gengar is swift and can land one at a good time to change the momentum of the battle.
Charizard: Your set is extremely powerful. Every OU Pokemon has a hard time taking his dual STAB moves (bar Heatran and a few select others), but at the same time, he is weak from residual and opponents' damage. Try to implement a
Bulky Dragon Dance set, as Charizard can take more damage and setup without worrying about longevity. Here's the set:
Charizard @ Charizardite X
Ability: Blaze
EVs: 144 HP / 252 Atk / 112 Spe
Adamant Nature
- Dragon Dance
- Dragon Claw
- Earthquake
- Roost
This set is one of Charizard's deadliest, and I've heard from many prominent OU players that this is a serious set to deal with.
Hope this helped, and good luck!
This is amazing feedback and extremely helpful. I'm going to implement your suggested changes. I'm excited to move forward and begin battling!