Don't focus so much on V/S, but rather on the pitch. If you are on the glidepath, set pitch around 2.5 degrees (conf FULL) and then work around that figure to keep the aircraft on the glidepath.
Of course, if you are already visual at that point, it helps to keep the aiming point in the scan, but nevertheless you should look inside at that point as well. Try to also keep airspeed in the scan, which I know with A/THR is very tempting not to.