No, he's not right. These scenarios don't go as you two wish them to go. First of all, none of these four characters are emotionless robots, meaning that just like in EVERY last fight in this manga and numerous other mangas, there will be a lot of talk where none of these characters will be attacking each other and neither of the characters in team 1 have intel on Samehada's ability to share Chakra so during these talks and when they re-group to prepare for a second attack, Kisame can share his Chakra. More so, they can share Chakra once Kisame puts up the WD or Itachi casts a Genjustu on either of the characters in team 1. Kisame wouldn't be without a sword for a while, that's non-sense. It will take a second or two for Kisame to transfer some of the Chakra to Itachi and keep on fighting. They'll stick together and work together and they definitely will not be separated like you two wish them to be and let me guess, Jiraiya and Tobirama can separate these two despite them being on the same level as Jiraiya and Tobirama and despite Itachi's intellect which is most likely above both Jiraiya's and Tobirama's. Don't care about the Tobirama has experience fighting two Uchihas like Madara and Izuna. Neither of these use Genjutsu in the same way Itachi does nor do they have comparable feats to the Genjutsu feats Itachi possesses. No matter what oponent, they have always been caught in Itachi's Genjutsu. Nothing changes here. That's useless since all they have to do is use Genjutsu Kai. The rest of your post just shows you being completely biased to Team 2.
Yata doesn't block, it repells any attack by changing it's properties to those of that attack and negating it. Whatever is classified as a technique with properties or as an attack will be negated. Itachi and Kisame can camp in Susano'o while Kisame is sharing his Chakra with Itachi. Sound? It's an attack and it has properties, meaning it can be negated by Yata or Itachi can simply use Crow Explosions so he could cause shockwaves that would get rid of the sound. More so, if either of these two get caught underwater and Itachi uses Crow explosions there, water shockwaves will be created which can kill both of these instantly. Kisame can absorb Senjutsu. He won't turn into a frog or anything unless the amount of Senjutsu he absorbed is more than the amount of Chakra pool he had to begin with.
Team 1 takes it with low difficulty? This is why I don't like Jiraiya/Tobirama/Minato/Kakashi fans. They are biased (excluding some) and never even acknowledge that their enemy has a chance against them.
