I don't want to counter Sifu's message, but as i read a lot on Bodybuilding & Powelifting forums, i think you might try this:
Of the 3 days you train, do it one time with 3 sets of a weight you can barely handle, so you can only manage between 1-5 reps. This is training for muscle strenghts, and normally musn't give too much mass. The other 2 days, between 12-20 reps, like Sifu says.
Its known that between 1-6 reps is for strenght, 6-12 for mass and 12+ for endurance. So if you try 1 day for strenght, and 2 for speed and endurance, i think it will give the best result
