Oro's body is weird. For instance, Oro fought against Naruto in fox form and was beaten countless times and lived. And Oro was beaten by Tsunade countless time and lived. For a normal person that would be impossible. And Oro kill the 3rd. Even if Oro was slightly weaker in power to Jman, the fact that Oro has such good defensive body, Oro would win the fight.first J-man had been drug that day and wasn't able to use his chakra correctly, so not fair.
then sasuke got tricked by the 8 tailed, he had sub himself, so if he wanted, he could have killed sasuke from behind, in fact sasuke should have died coutless time in that fight!
And Susuke was stronger than 8tails. Ok, he did get some help. But if he didn't he could have accessed his Mantegel Sharingan by the heat of battle by himself like how he accessed his previous Sharingan in the heat of battle. And it was the black flame that beat 8tails.