Thanks, that is exactly what I needed!

I've gotten N-slayers before, so I'm familiar with the difficulty. I tried your upper left box strategy, since I usually use bottom center as it's closest to the spin button. Missed two slayers in a row in the bottom center position and went back, lol. If they're designing these correctly, then each of the 6 boxes should have the same chance to have all of the cards. Just a matter of random distribution and hitting the right combination when you guess. (Even a perfectly weighted coin will have heads or tails streaks).

So unless someone is flunking math before coding, you should be safe hitting any box it just may take you awhile to hit jackpot.