Firstly, i think you're missing something important. When Pain attacked the village, all the Paths were not in the same place. They were in different places. That means there are more possibilities to make 1vs1 or 1vs2 with them. It's not the configuration where they are fighting the 6 of them together like against SM Naruto. And with this configuration, for elite ninjas like Kakashi, Guy and Tsunade, the only dangerous Paths are Deva, Asura Path, and Animal Path.
If the other Paths fight Kakashi, Guy or Tsunade in 1vs1 i don't see them winning.
Just think if you will. I know it is hard but just think about it, which of the people you listed can fly? Which one can see that invisible chameleon? How about that dog that multiplies when hit? Does Kakashi have a counter for that? What about Guy? Tsunade?
- Have you forgotten Kakashi has the sharingan?? The sharingan can see invisible things(like Obito managed to see the invisible man in "Kakashi gaiden"). He will see that chameleon easily.
- Katsuyu could deal with the dog that multiplies(cuz it can also multiply itself and it's immortal), when Tsunade can punch the other summons just with her strenght. She is the one i think she could deal with animal Path as well.
And i don't know why you ask me who can fly. What's your point about that?
Any of Kakashi's moves can be absorbed by Preta path, and Guy does not have the skill necessary to fight anything other than Preta or perhaps Human Path.
Why do you think if Kakashi sees Preta path absorbing his jutsus, he will continue to attack by distance? He will use taijutsu as well, and he is far better in taijutsu than Preta path if of course he is alone(and doesn't have share vision advantage). And Guy also can do the same or even better cuz he is a pure taijutsu fighter.
I even think that either Kakashi or Gai could solo this 2Paths. They are not that strong at all.
Like i said, in a 1vs1 the only Paths who are dangerous are Deva, Animal and Shurado. The other could be killed quickly. I really don't get your opinion if you think that Kakashi, Gai or Tsunade couldn't even kill one Pain in 1vs1.