I think bank roll management is the only factor that can be attached to winning strategy that he is pertaining because you can increase your percentage of winning if you only bet a proper amount in proportion to your bankroll to last longer in the game and hit the bonus round as early as possible.
So gamble when you are ready to lose. But that does not mean giving up to lose, it's just that you will be less burdened when you face losses later. I have so far been fine, not addicted and not too ambitious to gamble. But when I am really in a state of wanting to gamble, then I will always put myself in sufficient finance. The point is not to gamble when I don't have extra money.