Backup QB in 2QB league for playoffs?

Should i drop Dion Lewis or Josh Reynolds for Josh Allen for my qb 3 to be safe?
qbs are russ and cam
rbs are ajones, david johnson, kerryon, ware, and samuels
wrs are k allen, j gordon, m thomas, and robert woods

other qbs on waiver are Tannehill, driskel, sanchez, rosen, kessler, and darnold