For every 9 points put into Alternate Form, you get a pool of 10 points that go into Alternate Form.  The Aura of Inspiration power would come out of that 10 point pool.  However, you do not get any sort of penalty "this only works as an angel" because that's the whole point of Alternate Form.<br/><br/>I would probably also give Marked at -2 for the wings, Flight with the Spread restriction, and a few similar things.