If you got really crazy, the theoretical max is somewhere around 1.8 Trillion. (4 kongs of 3 dragons plus your own wind which is wind of the round, all hidden, plus pair of any other wind. 128 + 4 (pair, self draw) +64 (all flowers, seasons) + 20 for going out = 216 Base. Doubles: 33. Total: 1,855,425,871,872.