Unless one of the Steelers or Ravens fall off, it basically is going to come down to Christmas Day. Right now, it is looking like if we are all tied with the same division record, the Steelers will have a good shot of getting in because of their record against common opponents.
Our common opponents are the Bills (W), Browns (2W), Bengals (2?), Giants (L), Cowboys (L), Eagles (?), Redskins (L), Patriots (?), Jets (L), Dolphins (?)
So right now we are 3-4. With 5 games to go. I'll say that we beat the Bengals twice and the Dolphins. Lose to the Patriots and Eagles. Finish 6-6
Steelers are Bills (?), Browns (W,?), Bengals (W,?), Giants (?), Cowboys (L), Eagles (L), Redskins (W), Patriots (L), Jets (W), Dolphins (L)
So the Steelers are 4-4. I'd guess they beat the Browns, Bengals and in this scenario we'd need the Bills and Giants to both beat them to have a chance and tie in this tiebreaker.
Simply put, we need to beat them Christmas Day or have them drop one to the Bengals or Browns (which the Steelers have typically done very well against both) so that we have a better divisional record than them. If we have the same record and divisional record, it is not looking very good for the common opponents tiebreaker. Those two loses to the New York's really hurt.