As far as strenght of schedule goes, based on this past season, the Dolphins will have the 2nd hardest schedule (Eagles will have the hardest).
Initial strengths are rarely correct. Teams are never as good or bad as the previous season. I'm not sure where we started but we ended up having the second hardest strength of schedule this past year too. 
Rank   Team   Opp. Record   Opp. Win Pct.
1   Philadelphia Eagles   161-123-4   0.566
2   Miami Dolphins   158-127-2   0.554
3   New York Giants   157-129-2   0.549
3   New England Patriots   156-128-3   0.549
3   Dallas Cowboys   156-128-4   0.549
6   New York Jets   155-129-3   0.545
7   Buffalo Bills   155-131-2   0.542
8   Washington Commanders   153-133-2   0.535
9   Los Angeles Rams   152-133-3   0.533
10   Las Vegas Raiders   150-136-2   0.52
11   Arizona Cardinals   148-137-3   0.519
12   Denver Broncos   148-138-2   0.517
12   Seattle Seahawks   148-138-2   0.517
12   Los Angeles Chargers   149-139-0   0.517
15   San Francisco 49ers   147-139-2   0.514
16   Kansas City Chiefs   147-140-0   0.512
17   Cincinnati Bengals   146-140-2   0.510
18   Chicago Bears   143-145-1   0.497
18   Minnesota Vikings   143-145-0   0.497
20   Detroit Lions   143-146-0   0.495
21   Baltimore Ravens   138-147-2   0.484
22   Tampa Bay Buccaneers   138-148-2   0.483
23   Jacksonville Jaguars   135-148-4   0.477
24   Green Bay Packers   137-151-1   0.476
25   Pittsburgh Steelers   134-151-2   0.470
26   Cleveland Browns   131-154-2   0.460
27   Carolina Panthers   130-157-2   0.453
28   Tennessee Titans   127-157-4   0.448
29   Indianapolis Colts   124-162-2   0.434
30   Houston Texans   123-163-2   0.431
31   New Orleans Saints   122-164-3   0.427
32   Atlanta Falcons   119-167-3   0.417