I normally do in this order leg press, lying ham curls, squats, stiff legged deads, walking DB lunges. I normally don't squat over 275 but really dont need to go any heavier after doing leg press/ham curls first. I feel squats way better the lighter I go but thats just me. High reps of 20 plus is a nice change of pace as well but I normally stick to 8-12 reps for legs.