I am quite tempted to make both Luzon and Kerala to be Nestorian refugias, is this even possible?
It wouldn't be impossible to have a Nestorian Mongolia or East Turkestan by having the Naimans or Khereids unite the Mongolian tribes. In fact it wouldn't be too difficult - there would be no reason for them to be forced into any other faith.
Alternative ideas:
- As said, the Ilkhanate is a possibility, though I can't see that working out in the long run.
- An Assyrian state founded after the fall of the Ottomans
- Assyrian refugees move to India like the Zoroastrians