BEST possible? Rosen slides and Bills get him at 12, but not sure I'd have the stomach to wait. So I guess they move up, giving up minimal draft capital to get him in the 8-9 range.
Add a stud LB, Evans or LVE at 22. Then get a WR (Chark or Sutton) and interior lineman (Wynn, Price, Daniels, Ragnow) in the second. Double down on offensive line in the 3rd, and get a solid DT at the end of the 3rd.