The VFA 8.0 DME is the same fix as the IIF 7.2 DME. The VFA 8.0 DME is charted for pilots coming straight in from GEBTI on the VFA 274 Radial.
For those flying the base leg there is no further use for VFA once starting the base leg turn at VFA 7.2 DME. The ILS should be tuned and identified starting the base leg turn. If flying the LOC (GS out) procedure then the IFF DME is also required.