What seems to be more important is the sparing use of these high intensity intervals outside of MMA training. By the way of training periodization, and the principle of specificity, the majority of the high intensity intervals should be performed few weeks out before the fight. Performing a high volume of high intensity training year round hinders a fighter's ability to improve their skills and stay injury-free.
You will notice that this workout doesn’t change much from week to week. This is for good reason. Strength is a factor in both endurance and flexibility, and strength is developed, in part, by practice. The popular modern trends of highly variable workouts and “muscle confusion” are inefficient ways of exercising. As we move into different phases you will see new exercises, but for now stick to the workout as written.