Yeah Oakland and New Orleans this week. Although far from great defenses, they are both facing teams without frightening offenses, so they will look much better than they are. Seattle may get shut out, or held to field goals. Tampa Bay has weapons but the RBs share the workload (meaning it will be rare for one to get in a good rhythm and have a huge game) and there's a danger of musical QB's this year.
Week #2 looks pretty bad for your defenses, and Week #3 one of them has a bye.
Try to trade for at least one better defense. Don't mortgage the farm but you must have good depth at one of the skill positions, so find someone that doesn't and get yourself a new defense.