I don't think the Minnesota defense was necessarily good last week, but they were lucky, and sometimes that's even better. However, I don't see that happening against Green Bay.
The two TDs the Vikings D got were because the Titans (Mariota) did something stupid, not because the Vikings did anything special. Green Bay doesn't make dumb mistakes like that very often. Before that the Titans were dictating the game pretty well. Once they were down, they started playing sloppy. Again, something the Packers don't do.
On defense for the Packers, should be pretty straight forward. Without Bridgewater (even with him really), Minnesota is pretty damn one-dimensional. Commit extra people to AP, and challenge Hill/Bradford to beat your secondary. It's what the Titans did successfully, but Green Bay has a better corners and safeties.
The final score might not reflect it, but I don't think this game is going to be very close at all.