KC needs three losses total. If BUF, PIT, and KC all finish 13-3 BUF wins most of the 3 way tie breaker scenarios. If you are thinking about this, Cleveland winning tonight helps fractionally.
Also, to keep it simple, you want anyone we beat to win as much as possible (apart from beating us of course). You want anyone KC beat to lose as much as possible. You want teams PIT beat to lose. If it gets to this point strength of victory could be the tie breaker and ours is really good at the moment. Carolina seems to be oddly important to this scenario.