Well here's my secret, I scale packs...it's actually really easy, if you can get yourself a small gram scale that can like fit in your pocket, then you can go to a place that just lets you grab packs on your own, ie. Walmart, Target. Super/Ultra/Ultimate/Secret rares weigh on average .1-.2 grams more than an average common or normal rare, which the scales pick up. So by scaling out packs, you can figure out the average weight of a pack, then you can see the packs that weigh more, and your odds of pulling higher rarities goes up.