I have no record for the best case scenario, but the best scenario is that our defense improves and take the next step in the second half of the season because our young players like Burns, Davis, Dupree, Etc. takes the next step and Shazier has a DPOY caliber year
For the best scenario for our offense is that they are going to be healthy and at their best in the playoffs and they get better in the redzone and our road woes are things of the past.
The worst case scenario is 8-8, since we will still hear that Tomlin has never had a losing season, even if 8-8 would be unacceptable with the talent that the steelers have unless some major injuries happens.