I keep changing my mind, but I think signing Blalock and Wisnieski would give us a lot of flexibility.
Start with a base line of Robinson-Blalock-Wisniewski-Saffold.
If Amari Cooper drops, I don't want to pass on him. Draft Cooper and you have the flexibility of adding the best 0-lineman available in Round 2 (there should be multiple quality players available). Draft a center, and you can kick Wisniewski out to guard where he played better anyway. Draft a guard, and keep Wisniewski at center. Draft a tackle and you kick Saffold back to the inside.
If Cooper doesn't drop and a Scherff isn't available, trade down, snatch some extra picks, and take a hard look at Clemmings/Collins/Erving.
If Barrett Jones earns a starting job, shift Wisniewski to guard, and you have a rookie to groom who would likely need to start anyway.
I'm done rambling.