Dude do yiu not know what a plothole is any type of s/t tech is op in naruto and there isnt amy ways to improve on edo kabuto used the same as oro he just let some of them keep their conscience not to mention he probably had a summon that would help to i dont buy into all that hashi was the best crap because he doesnt size up better than the 2nd or madara or the third for that regard
Lol, how many times am I going to say this?
You have never seen Tobirama's S/T in action. For all we know, it could require a lot of prep time to use it. We've only seen Minato and Tobi's S/T tech. Yes, both are OP but just because two people's techniques are OP it doesn't mean that everybody else's technique is OP.
Orochimaru using edo is not the same as Kabuto using edo. Kabuto could control way more edos than Orochimaru can. Orochimaru only controlled like two and he hardly used them to their true potential. Tobirama's edo technique is even worst, and who exactly would Tobirama use as an edo?
And I don't know why you don't think 1st > 2nd.
Nothing in the manga suggests that Tobirama is greater than Hashirama.
Answer me this: If Tobirama is greater than Hashirama then:
1. Why was Hashirama chosen as Hokage
2. Why did people say Hashirama was the strongest of his era
3. Why does Madara only talk about Hashirama
At least with Hirzuen, people can argue against that because it says in the databook and manga that he is the strongest Hokage. But with Tobirama, you have
zero evidence to suggest that Tobirama > Hashirama.
Also, your great Tobirama lost to the Gold and Silver brothers.