Would learning sambo, judo and greco-roman wrestling be sufficent for MMA?

Sambo is the superior grappling system in the world. To hell with BJJ. Those days are over. Sambo is rougher, explosive, and the better fighting system. BJJ is just laying on your back like a bitc*. Sambo,judo, and greco?! Take it and in 6-8 months you'll see why.