You guys all miss the point. This is a team fight. Kakuza and Hidan are so far the only team who's ability compliments each other and can fight in a team. Every other team prefer to work alone and their jutsu don't even help each other. And we all see throughout the narutoverse how teamwork is the best. There teamwork is baddass anough that they needed to seperate kakuza and hidan.
We all see how Hidan can't get sasori, but what about deidara? All kakuza needs to do is spam a lot of AOE jutsu chasing deidara, hidan pops out of a large explsion and kills deidara that one of thier signature team move. Something no other teams has. No super big explosion because deidara risk injuring is partner Sasori, Sasori can;t get close because of all the AOE justu that kakuza keeps spaming. bomb are rendered useless as they are triggered or is destroyed by kakuza jutsu, sasori range is not as far as kakuza, he does not need to move since his heart does all the moving and he can just keep spamming jutsu aorud him so no one gets close. Hidan's slow speed is over come by the element of surprise he gain since he can just run around in kakuzu's jutsu. Sasori's poision is useless against hidan, hidan can be poison but won;t suffer from any effect. Hidan has shown to be able to function with just a head.Poison are therefore ineffective since poision shutdown bodily function and hidan doesn't need any to live.
In the end team 1 wins. Even if Deidara use C4 everyone will be killed but hidan. yeah he might just be a severed head left but still alive. and if team one has 1 person alive while team 2 is all dead TEAM 1 WIN!!!!!!