That's a good point. Although it might depend on if the person is more dominated by their dominant-function and DS or by avoiding their PoLR. Anyway I'm more in the favor of the subtypes resemble their mirror theory, than the other one.
So for example I would order gammas, from most beta to most delta:
SeFi-Se, NiTe-Ni
SeFi-Fi, NiTe-Te, TeNi-Ni, FiSe-Se
TeNi-Te, FiSe-Fi
Actually there might be no rule at all to this, so it just depends on the person and situation, what they resemble the most.