Ranking All 32 Defenses (pretty decent take)

If Davenport winds up being a stud in his first year then you can go ahead and bump that up to a top 5.

If Okafor comes back 100%
If Davenport over-achieves as a rookie
If Davis balls out for us like he did last year for the Jets
If P-Rob balls out for us like he did last year for the Eagles
If Rankins and/or Onyemata make a 3rd year leap
If Anzalone stays healthy
If Lattimore, Crawley, M. Williams, Bell, and PJ all continue to improve
If Coleman returns to his pre-2017 form in coverage and as a ball hawk...
If Klein and Te'o's consistency improves a bit from last year...

A lot of "IF's", but a lot of these are actually expected this year. And we don't need all of them. Even with some or most of these things happening, This year's defense could be very special. If they all do, then the sky is the limit.