I think they're top 10, but probably a little overrated. I'd put the Eagles and Commies DL over theirs, especially since Rousseau isn't playing.
But what has killed the Vikings has been the blitz. The Bills don't blitz (rank 31st in blitz rate), and I feel somewhat confident that our tackles will hold their own against Von Miller and whoever replaces Rousseau...maybe Basham. Of course when they loop inside, different story.
What scares me most is an ailing Allen starting and choosing to run more to save his arm. Vikings held Kyler Murray in check, in part by spying him with Asamoah. Murray's longest run was 8 yards, so we'll likely see that again if Allen plays.