I noticed players undergo points inflation the more they play. Not sure how this works, but I’m pretty sure people gain more points than they lose to other players (e.g. you can get points for beating players with 0 points).
This means that even people with crappy lineups (i.e. with no Ragnoraks) can eventually reach the higher milestone rewards if they keep trying. In fact, it’s better if everyone with no two-star heroes keep trying to climb, because it means we can gain points off each other.
I can see other people who run Venom/Yelena/Daken at the 800+ region and they’re the same people I beat around for points. I personally hit 900 points with that combination so it shows that you don’t need to own many 2 star covers to earn tourney rewards.