Leg Extensions 1 set to failure, 12-15 reps
Leg Presses 1 set to failure with negative-accentuated reps, 15 reps
Leg Presses 1 set 12-15 partial range reps to failure. Work the middle range of the movement first then the top third after that.
Lying Leg Curls 1 set to failure,12-15 reps
Stiff-Legged Dead-lifts 1 set 12 reps to failure
Standing Calf Raises 1 set 15-18 reps to failure
Seated Calf Raises 1 set 12 reps to failure
This an effective routine. There should be no rest between sets.