All i did to win em easy because i had loads of trobble with em aswell was simply, betting as many money as you can on
3, hard 6, hard 9, trips, hard 12, hard 15 and 18
And keep repeating that untill you win, and when you win, the other players will basicly have no chance of reaching you, it worked for me.
"After I'm dead I'd rather have people ask why I have no monument than why I have one."