I like Jiraiya, but him beating 3 Paths of Pain isn’t as good as some people think. He only managed to do so by taking advantage of the environment and ambushing them with a genjutsu, which Nagato wouldn’t expect from Jiraiya since he know Jiraiya was bad at genjutsu. The Deva Path wasn’t among those 3, and let’s be honest, the Deva Path is the strongest Path by a huge margin. I’d argue that the Deva Path by himself is potentially worth just as much as the other 5 combined. Had the Deva Path been there, it would have been a different story