I'd credit to AS: you should end up with MVP status until January 2015 that gives you baggage and better Y seating on BOTH AA and DL, ability to spend miles against BOTH AA and DL.

AS is a fine airline to dump miles to given that you have some reasonably premium options available to you (LA, AA, BA, AF, CX), as well as a handful of AS options to get you to a gateway (EWR, DCA), and some basic benefits of status on both AA and DL.