I just can't see him using a large-scale Kamui with his base chakra reserves or without an immediate counterattack from the Six Paths. Kakashi isn't going to spam Kamui from the start anyway, if he's in character. How is he going to Kamui all of Animal's summons if he is battling the other paths simultaneously? I never stated Preta could absorb Kamui, but any other ninjutsu in his arsenal is immediately rendered meaningless. To each his own, I suppose. Good debate.
He already warped gedo arm (with his own chakra)which is much bigger than paths ,in addition to gedo arm sized kamui ,he used another 6 kamui on himself,minato's sm rasengan ,obito twice,naruto and sakura and madara gudomas
I amnot saying he will warp the animals,I say he will warp the animal path
Whatever ,if this in character(I admit that he won't warp them together at the beginning of the fight) ,then it can go either way seeing how kakashi was able to use 6 human sized kamui plus gedo arm sized kamui after fighting obito in the other dimension though if this was nagato himself ,I think it would be easier to kakashi since he is one body not 6 ,alright?