Well let's talk rep ranges.
10-15 reps for multiple sets in a workout gives the best results for mass, so if it's just mass you want, it's something like a "typical bodybuilding" routine:
Front Squat 5 x 10
Leg press 3 x 15
Stiff legs 3 x 12
Leg ext 2 x 12
Leg curl 2 x 15
This may be way too much volume for most people, but for someone on anabolics, it can certainly be varied and performed twice a week for great results.
Personally I prefer to train lifts and try and get stronger, and as that happens I get bigger, so no body-part specific training, just some kind of squat in the 2-6 rep range every workout x 4 a week and then occasionally extras such as lunges, romanians, ext curls, for higher reps 8-20)