Dallas fans will have to go for( in order of importance):
1. 49ers
2. Vikings
3. Rams
4. Bills
If DALLAS wins, they clinch the tiebreaker over GB. So, as a plan B, at 11-5:
PHIL 11-5 wins division
DAL 11-5
DET 11-5 WINS DIVISION
GB 11-5
AZ 12-4
SEA 11-5
Green Bay loses out. SEA get #5 due to CONF. DAL get #6. But this assumes ones of the DAL wins is vs. PHIL (that is a common game with GB).
If DALLAS loses to PHILLY, GB gets the tiebreaker over DALLAS. Common games would end in tie ... and GB has dominant lead in SOV.