What about building the Mids elsewhere? We could, e.g., chop it in Aksum to finish on the turn it leaves revolt. Would there be enough time to still switch into Representation?
We enter a GA on T106, declare war on T109, (should) capture Aksum on T110...?
It won't work, Askum is size 11 at the moment and it needs 1 turn to pop the border as well.
OTOH, I have no problem mind banking gold until OU is in. Moreover, if the capital does not build Oxford immediately, University whips elsewhere can be less severe. How much

do we have in your Pyramids test?
If we consider that we will need to self-tech (1) Nationalism, (2) Military Tradition, (3) Gunpowder, we need enough gold to research these before stomping the map. If we would still have a large amount of gold left due to delaying Oxford, we should reconsider.