While both OT and C are big (long term) needs, given where they're picking now I see them addressing center (or call it interior OL, someone that can play C/G) in this draft and then OT high next spring. They do need a better 3rd OT this year than Williams but I think that may come later when someone shakes free from a roster after the Draft.

In terms of needs and also where they can likely find good value with their 2018 picks, I see:
ILB
Interior OL (C/G)
TE
OLB/Edge
NT
RB
DE

I'm on record as thinking they won't end up with 8 picks in this Draft. I think they'll move around more but ultimately package a few picks to move up and end up with 6 draft choices. Quality over quantity. If they end up with a good ILB, interior OL, and NT that can be on the game day 46 as rookies I'll be happy.