Justice Shadower revamp - which skills get turned into which?

We all know that Shadowers are getting some skills deleted (Taunt, etc.)

What I'm wondering, and this has been bugging me as well as other jajaja'ers in the Basil Shad forums, is if we leveled, say, Ninja Ambush up to 30, would NA get transformed into a separate skill but has a mastery level of 30? Or will it be like the Chaos DB Phantom Blow fiasco, where we have to use the mastery book again?

If the answer to the first question is yes, then exactly what skills get turned into what?

If the skill you leveled is deleted, like Ninja Ambush, then you get the amount of SP you used back and you have to use the new skill's mastery book.

However, if you save your mastery books for deleted skills, you can trade them in for any new skill for your class via maple admin.