1.We don't know if Nagato can resist Itachi's genjutsu...he was traped on jirayija's genjutsu..so that make's me think he can't..still idk..and about ppl who say it can't get cuz he have rinnegan...so?...just cause is the sage's eyes does'nt make him perfect on everything...and too ppl who say he would'nt look on his eyes even a smart man like kakashi,or sasuke was trapped on tsukuyomi.....and naruto even with intel on tsukuyomi he still as trapped by just watching his finger...
2.Amaterasu could be countred..but if he has no intel, I doubt i..and if he got catched on amterasu people say's he would take it out with shinra tensei..yes cuz he was an edo and don't feel any pain or anything im sure being catched on amaterasu is a pain in da ass..and look how his body was when he took out amaterasu from his body..and look he is regenarating from edo tensei cuz his body was destroyed
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3.Susano'o..... when nagato was killing bee and naruto, when Itachi cuted through him his hands were all cuted here:
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people watch nagato as an edo only weaker, no hes stronger....now here he regenerates again:
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about the nagato kuchiyose's that some ppl say Itachi can't beat those huge kuchiyoses here he beat them easy:
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about shinra tensei here nagato did's a really huge shinra tensei
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and here we see Itachi not even a scratch on his body
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, and don't say he did'nt hit him because he was an edo because before the huge shinra tensei Itachi already had free of from edo tensei here:
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+ totsuka blade could seal him fast since the deva path flies so slow and the totsuka blade is still faster then that fly
Sucking susano'o cuz he's a chakra monster:no.He would'nt be able to go after susano'o and suck him cuz totsuka blade would pierce him before he tries to suck it...we still did'nt see yata mirror's power...but from the kirin atack that's an strong tech(is ont hit tech)
Itachi still survived so idk what to say anymore but i think they're equals.....