that is graded higher

I think the top pick should be the highest graded lineman or edge rusher

If that is a center--great, if it is one of the excellent tackles that falls, fine, too
but there are a few elite edges---if one of them falls
someone who will be more than ordinary grab him

then on the two 3rd rounds get what you don't get in 2nd round
lineman, good place to take an IOL should be good center
there---

2nd 3rd rounder--best CB . . .