Equip your luck items and spin til you have a considerable amount to roll over and over.
As of 1.5 the old casino trick was patched, making the lots more favorable towards the player and alot more luck based. You're going to need a good amount of Qi coins to keep he loop up. The game speed up software will give more efficient results a lot quicker. I REALLY reccomend using an autoclicker at the minimum. autoclicker (Mouse software or any autoclicking program) Any kind of luck boosting items (luck ring, good fortune, etc)
Qi's quests to this point(riddle quest with sand drag)