While this may sound like a bad way to play poker at first, GTO is a proven strategy that works like a charm, especially in heads-up poker. In fact, computers have only been able to really solve heads-up play thus far, but many of the concepts of GTO play can be employed in 6-max games and ring games as well.
Mexican Poker is played similar to the five card stud format using only 40-cards plus a joker. The eights, nines and tens are removed from a regular deck of cards. The joker is wild unless it is exposed by the dealer. If exposed, the joker can only be used as an ace, straight or flush.