>>539775050
Sadly the thing about ranking is that they're all about the prep work you do before the actual event, so if you're missing stuff that the top players have you'll have to forge your own paths when going for higher scores. That'll mean ignoring some bosses/units you can't beat and just trying to get the max amount of points against the enemies that you can beat.
But also you can get the rewards (other than the commander clothes) from just deploying a dummy on the HQ, clicking settlement, clicking ok, and repeating the process until you hit the point threshhold. Then you don't need to worry about your actual ranking score and can just do it for fun if you want to see how high you can get with what you have.