Strength of schedule is calculated from the opponents projected fantasy points allowed for the DEF position. The best rating is +16 which gives the player the advantage against the defense and indicates an easy opponent, the worst rating is -16 which gives the defense the advantage and indicates a tough opponent.
Consider the slowly improving Jacksonville defense a low-end starting option against a Buffalo offense that struggles on the road. During the last month, the Jaguars averaged 2.8 sacks and 1.5 forced turnovers per game. In that same time frame, the Bills offense, in three games played, allowed an average of 2.67 sacks per outing and committed an average of 2.33 turnovers per contest. By the way, Jacksonville allowed seven sacks and turned the ball over five times during a Week 14 road loss to the Buccaneers.
The Jags have gotten the safety they so desperately needed (Cyprien) and retooled their secondary as best they can. The problem is it still looks relatively threadbare, with their secondary looking only marginally more promising than their QB situation. It's only a workable "Front 7" that elevates them above the rest of their peers.