Welcome to The Wall, STL-Bills.
Right now I can only see the Bills going with best player available in the 2019 draft. I would think they would go offense, because we do need help on the line at wide receiver and running back.
This of course depends on what we do in free agency, considering how much money the Bills will have to spend, but I know you primarily want to look at the draft in general.
One thing I will say about next year's draft is that I would not be surprised if the Bills went with defense in the first round. Defensive Line is by far the top position in next year's draft. Both at Tackle & End, there are a lot of prospects that will be worthy of being taken in the first round, and enough depth at the position to last throughout the first round. I could easily see McBeane having a good look at one of those D-Line players.