I can't help but say muay thai even though none are better. Its a personal opinion that you shouldn't study under what one person believes is most effective. You have to follow your own path. You need an origin, one art you have truly mastered before you should practice another, that way you can find what suits your own needs. Arts that are already mixed together just muddles the concept of each of the individual arts. Jeet Kune Do was Bruce Lee's. He was happy to teach people what he thought was most important, but I'm sure he wouldnt advise learning what a small group of people different than yourself say. Do Muay Thai first. Then expand and integrate what you learn next into the Muay Thai. Or whatever style you believe will work for you as your base.