Catholicism should remain if you choose to join the Counter-Reformation.
And since I'm productive at the moment, I've also added the Tibetans today:
Leader: Lobsang Gyatso
Unique Unit: Khampa (Horse Archer with +50% city attack, can cross jungles and foreign borders, +10 cost)
Unique Building: Gompa (University with 10% research, +25% defense, +1 free priest, +1 priest slot, requires Engineering and Paper)
Unique Power: Missionaries (Unlimited missionaries, missionaries can cross foreign borders)
Unique Historical Victory:
- Acquire 5 cities by 1000 AD
- Spread Buddhism to 40% by 1400 AD
- Settle 5 great prophets in Lhasa by 1700 AD
The first goal is meant to represent the Tibetan Empire which is approximated in the screenshot above. I didn't want to require to conquer these specific cities (the actual Tibetans controlled Bengal and the Tarim Basin), but I fear that only number of cities would have people go conquer India or something.
Maybe I should ask to control (cover with culture only) one dye, tea, cotton and silk resource instead?
Numbers and deadlines of the other goals still need to be balanced, commit follows soon.