that's your answer one shot kill.you have not proven crap as of yet everything you said i countered and you have yet to tell me one thing how itachi>nagato or answer my question you fanboying hard. dude come back when you actually read the manga get off this thread.
Well u are saying why nagato>itachi right?
Without going into stats... Nagato really hasn't anyway of getting through Susanoo (maybe with Chibaku Tensei which was shown to be possible to break). Plus Nagato hasn't anyway of countering either Tsukuyomi or Amaterasu. He can repel Amaterasu, but will get caught in it again and will only be able to get rid of it after 5 sec. Finally, there's the sword of Totsuka. He was shown getting sealed by it already so he doesnt have any counter either. He was being distracted but I believe with the range of techniques/genjutsus Itachi has, he could distract him way more.
Nagato has no way of breaching Susanoo while Itachi has a lot of moves to finish Nagato fast. that is why I believe Itachi does not need a whole lot of stamina as he has many ways of oneshotting nagato.
therefore Itachi > Nagato imo
And don't go with the dumb fanboy argument. Itachi was one of my least favorite characters in the beginning of the show and he still is far from my favorites. I just believe Itachi to be a really bad matchup for Nagato. And after all the scenarios, I can't see Nagato winning.