He fit a narrow set of qualifications: elven, impeccable reputation, and able to do it.

( ‘willing to’ fell under being elven, and being persuadable by thranduil. )

Correct. I watched, for what it is worth, which is little. You will need a mage who was trusted enough in their Circle to be taught.

Most of them are dead, I suspect. Myr and I have not corresponded in several years. He was reluctant enough to do it the first time.