For years I have used olympic lifts to provide a firm base. My favorite lift is the clean and jerk. Very taxing but the size it will put on your shoulder girdle is amazing. I will usually stary out a shoulder day with clean and jerk, three sets of 8,6,4 and then move into some more isolated shoulder exercises. I would definately recommend giving olympic lifts a try. They will give you a great overall mass and a more balanced body.