Without any ASB, have the crusades be as successful as they can be.
You must:
Bonus point for every one of the following you manage to achieve:
Good luck
You must:
- Have at least the Levant, including the cities of Acre, Jerusalem, Tyre, Tripoli and Antioch remain permanently in Christian hands
- Have Constantinople remain permanently Christian throughout history
- No Islamic invasion of Europe post-reconquista (so no Islamic invasion of the Balkans)
Bonus point for every one of the following you manage to achieve:
- A united Kingdom of Georgia survives throughout history
- The Byzantine Empire survives
- Egypt is conquered by crusaders
- Damascus is conquered
- Central Anatolia is taken back by the Byzantines
- Crusaders take Mosul
- Teutonic State survives to the present day
- Christian Turkish states exist north of the Caucasus and in Eastern Anatolia
Good luck