Establishing why Sasori should be in the top 10.

[Penguin]

Took down a whole nation with puppets. Obviously a very weak nation.
The fact that a little girl and 10 puppets from an old lady destroyed them.
To make it clear Sakura actually made Sasori run for his money since she broke his best puppets.
Of course Chiyo controlled her but without Sakura's immense strength they couldn't have broken them.

Without Chiyo, Sakura is dead. No Diff.

Without Sakura, Chiyo is dead, Easy/Med Diff.

 

[Momo86]

Without Chiyo, Sakura is dead. No Diff.

Without Sakura, Chiyo is dead, Easy/Med Diff.

It basically doesn't count. Yes, Sakura and Chiyo together manage to destroy 100 of Sasori's regular puppets and two of his human puppets, namely the two strongest ones. Yet, had Sasori wanted, he'd just could avoid Chiyo's last strike and just kill both kuonoichi and then go on with his life. He'd still have 296 human puppets with a variety of Kekkei Genkai and whatnot, plus he could build new regular puppets.