Williamson should be cheap
Depending on his 'injury discount, he might be worth a look if he plays every week and takes a chunk of the kick ins. Although that's on the assumption that any kind of movement outside the square is seen as playing on therefor the following kick/disposal is registered as a stat.
Would think Setterfield is probably better value, last valued at $197k so might drop to the $140k mark considering he didn't play last year?
Newman might be an ok value pick depending on his role and if he's definitely secure in the best 22.
Might as well lock Doc in now.