tobi solos them plot no jutsu he needs them for now and i did imagine it and i saw tobi cracking the chakra chains and them losing ever see roots ....tobi would be like i said your name is tobi..wait he is tobi nevermind lol
I said Imagine damn -_-. And Tobi implanted it in them so they would have it if they broke the edo. They're not spiritually attached to him so they would keep it.
he still has gedo mazo, and the rinnegan. not to mention, the pains would lose their sharingan and rinnegan, ie all the perception abilities which made them a flawless unit. tobi can take them by himself imo, but not with naruto, bee, kakashi and gai there too.