The moment they make the slightest contact they get absorbed, if Deidara detonates them early they're useless. Absorbing the chakra out of the clay disables them.
madaras V3 susano is of a similar size to a biju. it hovers over any nano bomb cloud that deidara uses. a juubi sized katon also eradicates everything on the battlefield.
blind madara doesnt need susano to beat deidara. all he needs is katons.