It was stated that the Vulcan stopped doing AAR years before as it was too dangerous. I would agree it was sporty but that was not the reason why.
I did the AAR course in 1964 and we would have worked up to use the Valiants. The scheme was that route activation would be done with Valiants at Malta, Aden, Gan and Singapore and the Vulcans could then flow down the route.
The premature grounding of the Valiants cancelled that plan. Simply the Victor 1 replacements could not uplift enough fuel and needed to do tanker-tanker refuelling first. Route activation by Victors would take too long and the Vulcans could reach Singapore sooner.
By the time the Victor 2 was in service the requirement had gone away and the priority shifted to refuelling the Lightnings and F4s and trailing other FJ across the pond.