I thought I had answered this, but my browser was acting up a bit ago. Apologies for the delayed response.
Ki Mastery is
Heroic. A character could start out with Ki Mastery (if he chooses it as his free Edge of Heroic rank or less) with an eye towards getting Lightfeet at Veteran, otherwise, he'd have to wait a bit longer. I'll be the first to admit there are some intrinsic rewards for thoughtful builds in ID, but that's what you get for having so much flexibility. However, if you want to drop it to Veteran, Konoyo won't explode.