Tobirama is smarter than him, but I doubt that he could beat him one on one. Tendo is just way too powerful for him.
If it wasn't for Pains large scale Shinra Tensei, he would have destroyed Naruto the moment he faced him.
Tobirama would get shitted on. Pain would keep spamming Shinra Tensei and Tobirama wouldn't know what the hell happened. Madara easily beat Tobirama so Pain can do the same.
Juubito and JJ Madara, both Juubi Jins and dojutsu users by birth. Nagato, not a genuine Rinnegan wielder, 0 Senjutsu chakra, no Juubi power. Tobirama defeats Pain in 15min max, Nagato's biggest weakness is S/t because of his disability, he doesn't have the mindset of someone used to speed blitzing
because when naruto arrived pain was a bit exhausted already because of his use of massive shinra tensei which destroyed the entire village not to mention he fought a lot of people before naruto arrived....if deva path was able to fight from the moment naruto arrived then naruto wouldnt have won...naruto had a tough time fighting against deva path alone...now imagine naruto fighting against fully rested pain with all six paths......not to mention naruto still lost and was able to break out of pain`s control only because of hinata
What's so special about Tobirama? His pitiful water guns? His lack of any decent Jutsu bar FTG, that can be easily countered with reflexes? One techniques with Edos that requires him to commit suicide?