User blog comment:SomeoneYouUsedToKnow/SYUTK's V5E13 - The Fall of the Fall Maiden - Impressions/Recap/@comment-34633327-20180118014040/@comment-26018514-20180118074458

9-2.  I'd assume she planted the "ball" into Cinder's face with that Minato lightning face smash she did... OR, that the only reason they ever needed to physically cast using an object was because they could not manipulate elements within another's "aura-field"... no aura left, no problem... instant Cindericle

That said I was likewise disappointed Raven never tried cutting the arm... I can only assume that as a Geist arm, she knew it wouldn't work and she needed to hit the mask to damage it(that's the only in-universe explanation that I feel would make sense).

10. When Jaune says "amplify", I don't think we are talking a 1+1=2 kind of relationship... I think it's more like a ^2 or x3 amplification... the thing that makes me question however is what if his own Aura level was never actually high... rather his semblance was already passively amplifying the only aura it is close to... his own... then again if that was the case I suppose he wouldn't have been able to pump up higher to block Cardin