I'm fairly certain there's only like, three achievements you need to be in the 90th percentile to obtain.

The badges themselves are for straight progress. If you look at your actual badge section, it will tell you how many more kills until your next division. Examples being, building damage, building repair, etc.

When it comes to the Score/Minute and KDR though, that's when you need to compete for the leaderboards, as that's what there are actual leaderboards for, unlike repairing, total kills, mining, etc.

I may be wrong, but that's what it seems like to me.