The Allied Shinobi Force from the outside will be pounding Obito and Madara with attacks and the raiton attack used by Darui and his men could momentarily blind Obito and Madara allowing this plan to work.I really like the idea of demolishing Juubi from the inside out like FFX Sin, but the problem is Madara and Obito are on top of it and I doubt they'll just let it be destroyed from the inside, and maybe the brothers' souls have been assimilated already into the Juubi.
OT: Sounds like a good theory. Overpowering the Juubi isn't going to work so they'll have to remove the chakra of Hachibi and Kurama so that the Juubi can't maintain its form any more.