Board Thread:Naruto Discussions/@comment-1018594-20150217173857/@comment-1512913-20150217221106

Hmph. If I were to make a comparison, Orochimaru with his own body and no bodily modifications is equal in power and prowess to Tobirama. With them, he is much stronger though. As stated above, we haven't ever seen him at full power going at it. With Hiruzen, he was just fooling around, having zombies fight him, then he got hit by surprise with Shinigami. The point of that was to beat Hiruzen psychologically more than physically, so yeah, he wasn't serious.

The best deduction of Orochimaru's full power can be made in my opinion from his encounter against QB Naruto at the bridge, he was serious then. Even completely without his Ninjutsu, he was a match for 4 tails QB Naruto and that's quite something. Add to that his Ninjutsu = all 7 natures mastery and likely thousand techniques at his arsenal.

So I'd rank full power serious Oro even above healthy Nagato.