I sometimes add in a couple of things I learned in basic pranic healing - the aura sweeping and localized cleansing techniques can really be helpful if an area is very congested and allows Reiki energy to penetrate more completely. But the rest of my treatment is done using Reiki techniques.
I believe the other healing modalities are good complements to Reiki, and if someone is trained to do them and can help faciliate a deeper healing process, all the better. Our bodies respond differently to stimulus and I see Reiki as aiding significantly with massage, chiropractic and other hands-on healing techniques. My chiropractor was so excited by my exploration into Reiki that she took Reiki I (will eventually take II) because she believes it will benefit her ability to faciliate her clients' healing process. As one of her clients, I wholeheartedly support her! :)