Chibaku tensei crushes them with ease. Not only is it way bigger than them (and can get even bigger than we've seen), it is not just a floating pile of rocks, please try to refrain from sounding ignorant. It has gravitational pull that Chouza and Chouji would be unable to escape or even move at all once they make contact with the primary mass. Furthermore the only way to stop CT is if the orb at the center is destroyed, which would be impossible to do as it is surrounded by incredible density of rocks and the Akimichis are most likely rendered immobile. They would be squashed like they squash others.