Tennessee Titans quarterback Ryan Tannehill says their offense is trending in the right direction.The Buffalo Bills’ defense will be the ultimate judge of that when the teams meet on Monday night in Nashville, Tenn.Tennessee (3-2) owns a comfortable two-game lead in the putrid AFC South thanks largely to NFL rushing leader Derrick Henry, who has rushed for 640 yards and is aiming for his fifth consecutive 100-yard game.But the Titans remain a work in progress. No team has allowed more sacks than their 20, and their receiving corps isn’t close to being at full strength. Julio Jones has just returned to practice after missing two games with a hamstring injury and A.J. Brown isn’t yet at 100 percent, although he played last week despite a hamstring problem.Now Tennessee faces a defense that leads the NFL in fewest points allowed per game (12.8), yards allowed per game (251.8) and takeaways (15). An offense some thought could be the equal of 1980s Air Coryell or the 2000s Greatest Show on Turf will have to tighten things up to avoid the fate of Buffalo’s last four opponents, two of whom have been blanked.”They do just about everything well,” Tannehill said. “You see them getting after the quarterback, see them solid in the run game, tight coverage on the back end, great in the red zone, great on third down. Really just an all-around solid defense.”And the Bills’ offense is no fun to deal with, either. After a shaky first two games, Josh Allen has gone back to the form he flashed in 2020, when he was perhaps the NFL’s top breakout player. Allen threw for 315 yards and three touchdowns in a 38-20 romp at Kansas City in Week 5.Buffalo is a 6.0-point favorite at most sportsbooks. The line opened at 4.5 at PointsBet, but moved significantly with 84 percent of the bets and 81 percent of the spread-line handle backing the Bills.The action has also been lopsided at BetRivers (78, 73 percent) and DraftKings (87, 85 percent), leaving sportsbooks exposed if Buffalo covers on Monday night.AI-driven predictive sports analytics provider Quarter4 has the Bills with a 63 percent win probability. Buffalo’s -265 moneyline has been backed by 89 percent of the bets and 80 percent of the money at PointsBet.