Intel doesn't change much. He can see Kimimaro's bones coming from the ground. White rage is once again dispersed with ST, even if Nagato is caught. He should have no problem performing a technique when Itachi could.
Unless Manda can fight for his soul, like Naruto did, the I see Nagato having no difficulty removing it. But again Manda Seems just a normal animal with superior senses to The original. Unless you're telling me Manda can figure out how to fight for his soul in a tug of war before Naruto and Bee could.
Summonings are just for Manda to be distracted long enough for Nagato to remove its soul. And given Nagato's flying ability, and Kabuto having no answer to flying, he can gain some distance from Kabuto and aim to remove Amanda's soul without distraction from Kabuto.
The chameleon is tricky. Jiraiya couldn't sense it. Ma had to user her tongue to find its location. KCM Naruto couldn't sense it. It probably has some kind of protection against sensory abilities.
Liquidification makes it worse for Kabuto once Nagato is attempting to remove his soul because Kabuto isn't pulling his soul back in, and making Nagato's attempt easier. Oral rebirth is the same because it only changes the body, but the soul is still in contact with Nagato.
Intel does turn things way more in Kabuto's favor. Nagato won't know whether to use Shinra Tensei, Preta Path, or watch and wait against Hakugeki as Itachi and Sasuke did. Shinra Tensei would most likely work against it, but the other two options, he'd get caught in Hakugeki. Yes, Nagato may or may not be able to break it near the end like Itachi did, but depending on the distance from Kabuto that won't matter. If he's close enough and Hakugeki goes off, it'll be a very quick fight.
Maybe. Kabuto can control Manda telepathically, so they may be the ones who have this tug of war. But again, Manda's soul is probably as large as the creature itself. Meaning it could take time, soul tug of war or not.
What if Kabuto is riding Manda 2? Or what if he realizes what Nagato is doing, which he would, and shunshins to him? It'll be difficult to fight SM Kabuto while ripping out Manda 2's soul at the same time, even with access to other Paths simultaneously.
One way Kabuto could end the match is while Nagato is ripping out Manda 2's soul, Kabuto could hide within Manda 2's flesh as Orochimaru did with a snake in part 1, then launch a surprise attack directly below or behind Nagato.
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Huh, that may be true with the chameleon. Although I'm not 100% certain because when Jiraiya put up a "sensing barrier" he would've been able to tell where it was.
Since Kabuto would know what was going on (seeing how he himself was the one who came up with that strategy), he could liquefy or use Oral Rebirth before Nagato arrives/moves in. Then use Kidōmaru's projectiles to attack the Chameleon, leading it to poof away. Depending on his distance from Nagato of course.
Then there's still the matter of Tayuya's Genjutsu.