If your main concern is BB'ing than do BB'ing reps. Between 8-12 usually. If power, than 3 to 6 reps, In any event, best to go light the first few weeks just to get the style/form right. Too heavy a weight, too soon, produces sloppy and bad form,leading perhaps to injury (lower back and traps/shoulders). Timing is also important when learning this movement.
Does Mass04 start from the floor, dead hand or pins? And use more of a jerk/push press?
The C&J is a outstanding muscle mass builder and somewhat quickly for a lot of people. Get to 15 to 20 reps and stamina (endurance & strength) can be built up greatly. Lots of athletes use these as part of a training program. If you want a full body workout, with one exercise, than try doing squat cleans and presses/jerks. Good luck.