If you are aiming for a guaranteed slot at AA, then you have to consider PDT, PSA or ENY. Assuming you flow in 6-8 years, you will have a few years with AA as an FO. No sure if 3-4 years there would be worth the while for QOL or pay. While upgrades are quicker at PDT, PSA and ENV in that order, you will have to commute your entire career. ATL appears to be a tough commute.

If the legacy option is not as important to you then I would consider ENDV with ATL base and no commute. Upgrade in 2 years or less and 10 years as Captain. Also a chance to interview with DAL with no guarantee.