Well, its about where the scouting team (with Nix at the top) has set their players rankings, both at individual positions and overall. They look at need, and overall talent/ranking, where that player fits into what WE are doing.
for example, lets say that Werner, is the top ranked Dlineman on our board, and the #3 player overall, if he were to slip to #8, and it were a choice between him or say Geno Smith. That would be a Spirited discussion, if Smith is our top ranked Qb but, lets say the 21st overall prospect on our board.
based on how LAST yrs draft worked out, Im inclined to think that Nix & Co. will stay put and hope their guy falls to them. IMO, i think they will target, ILB, QB, WR and CB first, either in FA or the draft.