Short deck poker?
What do you think? NLHE is pretty hard to beat as a lot of players have a good idea of (at least) the general concepts. This 6+ NLHE is new, almost no one actually knows how to play it. A google/youtube search for 6+ NLHE strategy gets very little hits which means the community just doesn't know much about it yet. Seems like there is money to be made if you study this game to create an edge.