It can't beat higher level chips without enhancement of course, that sounds impossible. It's just for the more common lower ranked to protect the user, not actively start a rebellion, in which case they would need to beat higher leveled chips. The creators of the style were only able to beat D, both against one, and that with whole bunch of luck and cheap tactics too. Not to mention they were/are the best of the style currently. Takeda hasn't even trained something in that martial yet, so he can't do anything yet. Sorry for not explaining it better, I'll edit it in the CS