I (the Dragonborn) want to mantle Talos. What are the undisputable prerequisites? What have I done so far (DLC included)?

• Pilgrimage to High Hrothgar. Check
  
• Greybeard Anointment. Check
  
• Patricipate in an enantiomorphic event. Check (several depending on your point of view)
  
• Numidium?
  
• CHIM?
  
• Successful conquest of Tamriel?
  
• Apotheosis?

Ok so what am I missing? What doesn't belong? Am I overlooking anything?