Board Thread:Naruto Discussions/@comment-3965545-20170209160500/@comment-7292165-20170210130911

Tsunade destroyed a miniature Susanoo with the aid of the Raikage. I have no doubt she could have done it alone, but I'm quite sure, so could A. She has never even made a "dent" in a giant version. She could break their swords though and could knock the humanoid Susanoo down (though I believe that part was anime only).

As for on topic, we have yet to see Hiruzen fighting in his prime and thus we have no proof to really discredit Hiruzen being the strongest Hokage. For all we know, he might have some super fuinjutsu that could swallow Hashirama's 1000 wood hands jutsu. We don't know. But, what we do know is clearly, the databooks weren't talking about old Hiruzen being the strongest Hokage or kage for that matter.