Locked Alliances and Shared UUs

[TheArsenal]

At first blush this will appear to be a question for the creation forum, but it is actually fairly specific to the C3C editor.

I’ve put together a Locked Alliances and Shared UUs scenario which I’ve been play testing (and enjoying quite a lot, honestly). The premise is that any civs that would be locked into an alliance for all of history would also readily share technology and units, including UUs. So, for example, Spain, the Aztecs, and Babs would all have access to Mounted Warriors, Jaguar Warriors, and Conquistadors. All which can trigger a GA.

For map purposes, and a couple other reasons, I set up the alliances to be:
1. Germany, Rome, England, Japan
2. Persia, India, Korea, and Scandinavia
3. Aztecs, Spain, Babs, and Iroquois
(I also placed three non-allied nations on the map: China, Mongols and Arabia)

The question: I would be interested in what 4 civ combinations you feel would go together to best combine starting techs (starting techs are traded lightning fast in this scenario) and UUs if you were putting together such a scenario. I’m looking for food for thought for putting together the second version of this scenario.

Thanks

[Donegeal]

Easy:
Iroquois, Zulu, China and Scandinavia

Try to imagine a Mounted Warrior stack defended by Impi. Scary. You should conquer your continent in no time. Now imagine that you can upgrade MW to Riders, add in Archers upgrading to Mideval ampibious units to get coastal cities on other continents (to land your 3 defense units in). You couldn't be stopped. The world would be your mid way through the Mideval Age.