If you truly want to go to AA, as your #1, I would go to Envoy, PSA, or PDT. Why? The vast, VAST majority of new hires are and will be flows from those three carriers. The rest of the new hires are prior military. The amount of new hires hired off the street that are former commuter 121 with no mil background is staggeringly low. The only people I know who work at AA now were hired prior to hiring being done in Dallas under the one brand. I knew 11 guys hired in the ~12 months leading up to me getting hired, and another half dozen afterwards, and have known ZERO who have even gotten a call to interview once they went to hiring solely via AA.
To put it in perspective, I applied to AA on Oct 2 2013 and have yet to get a call, yet I hold a line on the Airbus on the US side after being hired to it last year.
Not saying it won't happen, but the chances are pretty slim.