Amaterasu is not soloing anyone in this match. With full knowledge on Itachi, Nagato is never leaving Animal Path or Naraka Path out in the open to be targeted with Amaterasu. Animal Path can block Itachi's line of sight with any large summon/chakra infused bubbles from the crab, then hide both itself and Naraka Path in the invisible chameleon, where it can then bombard Itachi with summons for him to waste his poor stamina on.
Itachi won't need to use MS to deal with summons. Jiraiya takes care of them the same way Naruto did, by paralyzing them with Frog Call
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and nailing them with giant rasengans
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. Jiraiya also has a number of other ways to deal with summons, such as Goemon, Yomi Numa, Food Cart Destroyer, Raging Lion's Mane
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, or just kicking them away with brute strength
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. Chamaleon gets detected by sensory barrier or Shima's tongue
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and can also be seen by Itachi's sharingan the same way Obito saw the Hidden Rock Ninja through his camouflage technique. If Itachi for some reason does need to get rid of summons, he can easily use Totsuka, amaterasu, or control them with genjutsu.
That's not even taking in the fact that Itachi suffers drawbacks [
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][
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][
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] from using a MS technique to such a degree that he can't spam them in quick succession (which he would need to do to take care of Animal Path's summons).
Pretty much just addressed this. Jiraiya takes care of summons without difficulty, then Itachi nails Animal Path with Amaterasu once the summons are clear.
Full knowledge also makes Tsukuyomi not much of a factor, as Pain does not need to look into Itachi's eyes to fight him effectively (thanks to shared vision), and Sasuke canonically held his own against Itachi in Tsukuyomi. Engaging Sasuke in a genjutsu duel during a team match also leaves him vulnerable to be attacked in the event that Jiraiya is unable to counter Asura Path's missiles, chakra cannon, Animal Path's numerous summons or Shinra Tensei.
I agree that it would be unwise for Itachi to engage Sasuke in a genjutsu battle. However, Jiraiya can counter missiles, summons, and ST on his own.
Besides that, team one wins this. Preta Path once again makes team 2's ninjutsus useless, whereas Deva Path can set either member up to being Soul Ripped, stabbed with a chakra rod, stabbed with Chidori Spear, blasted to bits with a chakra cannon, decapitated with Raiton enhanced Kusanagi, or any combination of the above thanks to Bansho Tenin.
Through trial and error Jiraiya and Itachi can quickly deduce Preta's ability (Jiraiya figured it out after two attacks), and then proceed to finish Preta path through Food Cart Destroyer, frog Kata, Itachi's shuriken (which he canonically used to counter shared vision
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, Shima poisoning him
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or Fukusaku cutting him in half with his tongue
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. When Preta is out of the way, Jiraiya can use pure ninjutsu spam, with Itachi picking off significant threats with his oneshot abilities and using ribcage Susano'o to defend against missiles. Half of those techniques you listed are close range, and not possible unless Deva uses Bansho Tenin first (which would be suicide, since Jiraiya and Itachi can just attack him from long range while they are being sucked in, or they can use clone feints like Kakashi.)
Sasuke can counter Yomi Numa with Chidori Nagashi, while Pain can do it via Preta Path absorbing the swamp, and neither Deva, Human, or Asura will be defeated by Jiraiya's taijutsu seeing that Human canonically shrugged off a kick from him already, while the other two have survived being hit by far greater attacks.
Chidori Nagashi isn't a counter to Yomi Numa. Naraka and Preta's abilities are quickly deduced and killed at the beginning.
Frog Song is also not much of a factor, as it takes far too long to set up and unlike in canon, Jiraiya will be attempting it in a wide open area. Thus either Sasuke or Pain can interrupt with Katons/rigged Fuma Shuriken/Bansho Tenin/Chidori Spear/Shinra Tensei/missiles/Cerberus.
It's restricted in this matchup because then it would be too easy for Team 2.
As for Susano'o, Sasuke busts it apart with Kirin just like in canon (which would be made easier in the present location, which is full of rain clouds), then Pain finishes Itachi off with missiles/chakra cannon. Team one win with some difficulty at most.
Kirin isn't busting V3 or V4. Itachi tanked it with a ribcage. Before you say "Itachi will die from overusing his eyes", he won't die since he'll only need to use it once for a few seconds, as Kirin is a technique that can only be used once in a battle. Not to mention Yata Mirror.