Madara and Obito should have made clones of themselves to control the Juubi so that their real bodies would be able to move and wouldn't be stuck and be vulnerable to attackers. Obito would have been able to quickly make his clone use Kamui after using Juubi's TBB so that his real self can quickly swap positions after the damage was done. Madara should have made multiple wood clones of himself with PS so that he could destroy the Alliance. No cleverness? Please. I know it's because of plot but seriously... :shrug: