From the FAQs:
"Q: How do I get stronger for bjj/judo/mma/tha boxing?
A: You get strong. Too many people fall into the trap of thinking there's some magical exercise that will make their training somehow more applicable to their art, bollocks. Strength is strength, go train heavy and hard and you'll find you get stronger on the mat or in the ring. One leg squats on a gym ball while avoiding a stick swung by an old man with a Fu Manchu moustache won't help."
Sound simple? You bet. And I have yet to see anything resembling a coherent counterargument against it.