You need another D. Drop one of those fucking receivers and pick one up. Or better yet, be prepared to drop a WR for a D but just keep an eye on what's available. Don't necessarily look for a good defense (which are all taken anyway), but rather look for really weak offenses especially if on the road and pick up their opponent. I was picking up and dropping a D every other week last year and it seemed to work well.
And before you think you can't drop one of your precious SIX wide receivers, what do you plan on doing when PIT has their bye week, not play with a DEF? lol
Same goes for your kicker, when it's bye time you need to be ready with a replacement. Someone on your team needs to be on the bubble week in and week out, just sayin'