Have to let others answer whether an EAI is safe.
Phil lockrings have a that nice flange part that means your chain shouldn't contact the lockring. Definitely plenty of clearance with 14t. Expensive lockrings though, nearly 30 USD for one.
Hard to say about the EAI, couldn't find an image of one on a hub to compare it with a Miche.
Heres the Miche lockring, seems a little 'tall'.
http://www.fixedgeargallery.com/revi...w/miche/04.jpg