>>536865304
>I never Pon or Chi except if I can complete a triple wind seated/round tile (are they like called that?) or one of the Green/White/Red triples
My nyagger, I am about to change your life. You can also win an open hand if all of your tiles are between 2 and 8 of any suit (so no 1 or 9 tiles (called terminals) and no dragons (the red, white, green tiles) or winds (both dragons and winds are called honor tiles). This yaku is called Tanyao (or 'all simples') and is the best yaku in the game. Any time you have a bunch of shiny tiles and you want to win FAST, pon-nya and chi-nya your way to a tanyao (NO WINDS OR DRAGONS NEEDED). This is powerful knowledge.
Your winrate is actually pretty good but your deal in rate is high. Do you know how to defend?