Simul Battle?
Naruto, supported by Kiba and Lee, deals with Kakuzu and all his bodies.
Byakugou Sakura works with Ino to optimise Shintenshin and target primarily Hidan. Once he's immobilized, a Naruto clone can finish him off, cut his body with RS, or anyone at all.
Shino, Hinata and Shikamaru can work together stalling Sasori and his puppets. They can beat him or last at least until Kakuzu is taken care of so Kiba can lend assistance. His Gatsuuga can smash Sasori. The problem is the multitude of puppets and the Kazakage puppet. I think Shino should step up and do something with that. Shikaamru is also there to strategize and assess the situation and with full intel they could pull it off.
Tenten, Choji and Neji would act as immediate defenses, diversions and tanks against Konan, Kisame, prolly. Lee can also go against Kisame with Choji, Gates and Butterfly Expansion vs Kisame's jovial resilience and grand scale suiton. Tenten should spam her arsenal to combat Konan's paper bombs. It would be demanding but Shino can lend a hand too.
Itachi. This is difficult. I would pit Neji, Hinata, Shikamaru, Ino, and Sakura against him. Hidan's down and Ino can go for another zshintenshin. Shika binds him and Neji/Hinata finishes him off with Jyuuken. This is an ideal scenario though. Ultra Nerfed genjutsu.
Deidara, I think no one can truly minimise Deidara's explosive range. It all comes down to defeating him first. Naruto might as well finish him off with something. (I dont know how to defeat Deidara help me).
Crucial members are Sakura, Ino, and Shikamaru. Their task is to immobilized the primary targets one by one (Hidan, Itachi, Deidara etc.) until others murder, seal, restrict, etc them via Jyuuken, stabbing, chopping, infestation or physical beating.
Naruto and his clones is the ace here. But Kakuzu needs to be taken care first before Naruto can help the others.
EDIT: I didn't(haven't) include(d) Nagato and his Six paths of Pain and Tobi/Obito. If I were to do it, maybe let Konoha 11 have Kakashi and Gai and Killer Bee too + Suna Trio.