Its quite a decent lineup. And there is no such thing as an unbeatable team. with your current ninjas you couldn't actualy get any better team. But I feel like you should change to water main and have full skill break kurenai instead of killer bee. Thx to the imunity suppression from kushina and posion tai of water main you could actualy have a better team than the current one. Also kurenai full skill break will give you a extra heal, chaos and reflect. Also with watermains chase and reptile summon you might have a chance for roshis 30 combo chase in second round when you do his mistery.