moggiee,
As far as I understand it, by regulation, V1 MUST be above Vmcg. Think about it, the fly on case could be very exciting if you were to try to continue the T/O from a V1 below Vmcg!!
Vmca must be at or below Vr, or, to put things in the right order, Vr must be at or above Vmca. Once again, give it a bit of thought.