I am wondering would it be better to be the one body because of he will pick the paths off one by one or would attacking from multiple directions be more effective. Who is stronger?
The Six Paths of Pain has a weakness. Each of the paths can only use one of the 6 techniques.
Nagato himself can use all of them. He could also summon his animals which gives him additional vision through their Rinnegans. He has no drawbacks compared to the Six Paths