With manga knowledge, Nagato would know of Deidara's, Han's and Roshi's abilities, which means he would most likely opt for a Bansho Tenin + Soul Rip on Deidara at the very start of the match,
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to crush any member of Team Iwa not named Mu or Onoki. The team is not likely to anticipate this, seeing that none of them besides Onoki have experience facing the Rinnegan, and he himself never had to deal with Bansho Tenin or Human Path. Thus Deidara can be taken out of the match very quickly.
With extra arms thanks to Asura Path, he can also summon the Cerberus + any other large summons and bombard the other side with
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all at the same time. Han + Roshi would be next to go since their close combat styles make them easy targets for Preta Path + Soul Rip/Bansho Tenin + Soul Rip, whilst his summons and
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wipe out fodder like Ittan, Kurotsuchi and Akasuchi, and generally help to keep the other side at bay.
Thanks to shared vision from his summons,
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, chakra infused rain, and sensing abilities superior to Mu himself, it is very unlikely that anyone would be able to sneak up on Nagato in this match, even Mu. If Mu tries to sneak up and stab Nagato, he would most likely get caught via Asura Path just as easily as a
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, then Mu gets taken out with a
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.
And thanks to his chameleon, he wouldn't even need to be out in the open. He could simply pressure the remaining members of the team with
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, and if they aren't dead from being catapulted across Iwagakure (
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), he can go invisible via the chameleon and pick off whoever's still alive with surprise Asura Path chakra cannon, and/or Bansho Tenin + Soul Rip/chakra rod to the skull.
With missiles and summons providing ample pressure, and nukes such as boss toad sized Shinra Tensei and Asura Path chakra cannon on his side, Nagato can overwhelm the other side quite quickly before their bigger techs come into play. Jinton is absorbed easily every time it is attempted on Nagato thanks to his sensing abilities and shared vision anticipating it, so is every other chakra based ninjutsu used by the team. The rain hard counters Mu's invisibility, and if he attempts to destroy the clouds with Jinton (unlikely since he does not have knowledge on how Nagato's rain works), not only will he have to be visible to perform Jinton, he also makes himself vulnerable to being assaulted with missiles, or a Bansho Tenin + Asura Path chakra cannon/Soul Rip/chakra rod to the skull.
Thus Nagato wins this handily. If all else fails he can simply crush them all with Chou Shinra Tensei, then summon Gedo Mazo and kill anyone left alive with Soul Dragons.
