Nagato's strength is very strong, and Nagato in the red-haired state of the dirt can be said to be the existence of the first person under the six and five extremes, with the strength of one person against half of the ninja world.
As for Nagato's heyday, it is not mentioned in the original book, but the red-haired Dirt Nagato seems to be close to its peak or heyday. As for whether there is a golem of the Outer Path, the gap is not big.
Nagato and snakeskin pockets (including dirt rebirth) are on a grade, and red-haired Nagato is stronger than snakeskin pockets, but overall it is still a grade.
As for naruto, the 17-year-old naruto was already a being who could rival the entire ninja world. At that time, there was no one in the ninja world under the six paths except for the pillar band. Naruto, the nine-tailed (full) pillar force, can single out the six-level Golden Wheel King. That's why Nagato can't touch porcelain. However, at that time, Nagato could touch the 17-and-a-half-year-old nine-tailed human pillar force mode Naruto.
It can be said that in addition to the six levels and five levels, Nagato has not had one of the strongest in the past. Even in Nagato's heyday, he was in this position.