Idea: you have noticed a discrepancy between left and right SIJ. This you have to sort out 1st with manual therapy otherwise exercise will be not effective. Most of the time SIJ problems do not stand alone but will have compensatory effect at the L-spine (level L-5 and at T11-L1). Also to remember that there are numerous other pelvis dysfunctions you may have to treat. Clicking of hips: How do you know the hips are clicking and not the SIJ or the L-spine? (One might think it is the hip because the patient tells it clicks at the hip but what about the Pubis?)
If an instability is apparent of the L-spine you need to find out if it is in flexion-extension direction or in sideflex-rotation direction because the emphasis is different. In case of a Pelvis dysfunction you need to know if this is due to stability problems alone or also related to a dis-balance of muscles. e.g. high toned (Iliops)Psoas, Rectus femoris and Piriformis, Hamstrings and Quadratus Lumborum, Latissimus Dorsi with low toned Gluteus complex (and all these little muscles around the hip.