I wouldn't say we really "need" any LBs. If McClain and Lee are here, if we can bring back Durant, who shouldn't be expensive, and Hitchens is a three-position backup, that's not really a need.
I wouldn't invest a ton at CB either. Like it or not Claiborne will be back. You look for a value selection after the first round at some point and sign a guy to a mid-tier deal in FA maybe, that's it.
DL is the position that should get the resources, and safety shouldn't be messed with unless it's a true center fielder.