Saints will need to draft an OT before defense

He is, but he's not Joeckel or Fisher. You do not pass on a Jones or Mingo or Jordan or Lotulelei or Hankins for Johnson.

I get what you're saying: if a true difference-maker is available at #15, we take them and then probably take a LT in the 3rd (as uncomfortable as that makes me). Then again, we can't ignore the possibility of trading back.