I agree that muscular endurance is the most important for fighters, but low rep, high weight work is not ideal for "bulking." If you are in a bulking phase, you would just up your calories count, not necesarily change your set/rep scheme.
Generally speaking though, 1-5 reps = strength, 6-12 = hypertrophy, 15+ = endurance.
Check out illmatic's training log if you want to see a real nice balance of cardio, muscular endurance, strength training, and MMA/Bjj.
What a stud
The power of Aleks, his small baby and pimp hardcore dogs has granted you useful insight, my friend.