I'm thinking it might be better to research BW first and start getting rams all over the map, as horse archers will catch up to them pretty easily, and rams are excellent for tributes. That's what I did in my Lakes game, though obviously Lakes is a much easier map. And OCC is probably the way to go here for the insta-raze, less hassle that way.Yes, I had pretty clear memories of a previous Arborea non-islands game, and I figured the Huns' horse archer might be the only early effective unit that can move fast enough to possibly compete on a Pangaea. Problem is that you still need to move slow melee units or to get to horsemen to capture cities and even horse archers can get slowed a lot by bad terrain to fire on caps from.
Could be a good idea to steal a ton of workers as well and prebuild roads from one AI to another. The problem is the stupid unit supply limit though.