These are just guesses with limited study:
Free Falling LB - If Trent Simpson is there at 91, I would fully expect him to be the pick.
Free falling OT- I think if Dawand Jones continues tumbling the Bills will finish the job on the Oline and draft jones to compete with Brown. If he falls this far, I would like the Bills to take him there. So based more on desire than Analysis this would be my first choice in preference.
I think they shift focust to defense. I think there are five LBs in play. NIck Herbig (who is listed as an edge) Dorian Willams, Dayian Henly, DeMarvion Overshown, Henry Too Too. Williams looks like the biggest reach here, but I the player I think the Bills will pick if the go linebacker here.
I think otherwise it will be secondary - Tre Tomlinsion, Jordan Battle (s), Cory Trice in that order depending on who is available.
So in summary
Trent Simpson
Dawand Jones
Nick Herbig
Dorian Williams
Daylan Henly
Tre Tomlinson
Jordan Battle
DeMarivion Overshown
Cory Trice
Henry Too Too