The Eagles (9-4) have the Niners and Broncos at home. They'll clinch the division before the Dallas game. Can't see Dallas (8-5) beating both the Saints and Redskins. They must win one of those. They'll beat the Eagles, especially if the Eagles rest their key starters.
The key team are the Giants (7-6): they're @ Washington, home against the Panthers, and then @ Vikings. The Vikings will rest their starters for that one. The key game is the Redskin game.
If the Giants win their 3 games, they own the tiebreaker over Dallas.