I concede Tobirama if he has any notable edo tensei already PREPARED. However none of us can say for sure whether or not Itachi's susanoo tanks those attacks. I'm inclined to say it get obliterated, you say different which is fair enough.
However I'd like to point out that Itachi cannot use Susanoo for very long. Also Itachi's taijutsu didn't best KCM Naruto. SM Naruto is stronger and has Frog Kata, attacks which Itachi won't even be ready for. SM Naruto's is most likely stronger than Tsunade, so there is a similar situation with 1 punch gg.
You are very well indeed to your opinion.
Tobirama himself ftg, is already strong enough.
Itachi deflected every move kcm naruto had to offer in taijustu, also he was being controlled.
Madara has shown that a complete Susanoo can tank the juubi's Tenpachi...
I fail to see any technique Sage mode naruto has to break Susanoo.
May I remind you that a incomplete Susanoo was capable of crushing Danzo with a squeeze?
Didn't even mention the part where a single punch, turned Danzo into a blood fountain.
You can argue shadow clones if you like, but remember what happened the last time Naruto try to
Ambush itachi with shadow clones?
He took it out with two Kumai knives, and crow genjustu him.
Not only does he have to blind spots, but he can see chakra 360•
Just a little something you should remember too.