>>9862950I don't know about gen2, but as a kid I had figured out how the slots work just by playing it. In short, there are different kind of slots, the ones that win big but not often, and the ones that win often, but more often small than big.
But the trick is, it's never the same machine doing the same thing and they rotate after some time.
Always go for the win that wins often, so pick a slot, play 3-6 times, if you didn't win 2 times out of 3, move to the next machine. Switch machine once you start losing again.
DQ games work similarly too but not with such a good win rate.