Board Thread:Theories and Speculation/@comment-28939725-20161201164545/@comment-25122992-20161204214153

Again, he needs to be tangible for physical attacks. And physical attacks were something Obito avoided. And no, Deva Path was already overwhelmed by Kyubi-Naruto ever since he entered the 6-tails form, even reflecting Shinra Tensei back at him, and CT was the last attemp to subdue Naruto, though the 8-tails form was enough to broke free of it. Probably, more attemps of Nagato to make CT bigger could result in him using up all the chakra and dying, but they still couldn't guarantee the success.