But Kakashi faced off against the strongest path, the body did just shrug off a side kick to the head that launched him into rocks while Hungry Ghost(?) didn't really get hit especially hard and he had to be resurrected.
And no one else in the village besides Kakashi has a move like the Rasengan that can 1-hit people, or in this case bodies.
I think Nagato's link to the bodies can be severed if they are a) far enough away from his real body and b) if they get knocked pretty hard as we see with Hungry Ghost. Might be some feedback in the technique.
Bullet Tooth Tony: You should never underestimate the predictability of stupidity.
Reporter on Titan Maximum: Sasha is there any connection between your poor album sales and the fact that it sucked?