Talk:Affinity/@comment-73.253.162.41-20160204221910/@comment-24613667-20160210124841

Mastery rank is only associated with one thing: how many frames and weapons you've ranked up. You could literally just run missions on Mercury over and over until you've ranked up every item in the game, there's no correlation with difficulty whatsoever. And, really, having a high mastery rank doesn't necessarily mean you're good at the game, it just means you have a lot of free time.

The enemy level indicated on each node is the 'difficulty bar' and, over time, you'll learn how well your gear performs at those varying levels.