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First 10 Quali games >>> First 20 games > Quality = Quantity
This is more or less how the ladder works. While quantity can take you to places above your skill level, quality matters. So having a +70% W/L with a huge amount of games isn't neccesarily better than a +90% with fewer games.
Heck, with my AT we are the living proof that by winning somes games you can get to top3 AT (double OKW lazy OP). I think we had the (or one of) the lowest W/L ratio at the top50.