I don't know about CC2 or AoM, don't own either.
Just using muscle memory being able to lift two cards is something my friend developed. I do a push-off, still not perfect but performable (brief eye contact while I execute...misdirection is fun).
I also use the pinky count for triple lifts and sometimes for double lifts. Yeah, you dedicate months to the clipshift...I can pinky count individual cards.
I would go with what everyone said about CC2(don't own it) but Brad Christian is a great teacher and usually teaches simple, effective methods for everything.
Hope this helps,
-Rik