They rely on their defense to force turnovers and score points. Flacco has been solid for the most part, but the Ravens offense struggles to score and move the ball consistently. Also, as I have mentioned before, they have been decimated by injuries, having at least 16 players on IR.
As mentioned above, Washington (CB) was injured yesterday, and CMAC is already on IR. Landry (S) is also out for the year. It basically comes down to NOT turning the ball over against that Ravens Defense. Do that and you can dominate their offense.
On offense, the Ravens have went with McClain and Rice, Willis has been in the doghouse and injured, and hasn't seen much playing time. Mason is their consistent WR, while Clayton has managed a few big receptions. Heap also got injured last night and I'm not sure of his status.
Watch for trick plays also, they have a few of them in their bag of tricks.