Hrm... for elite status itself I don't recall any other airlines in OW that'll make better use of your AA miles.

In *A, you can accrue miles to Asiana which has much more liberal elite status qualification requirements, but I don't believe there's an equivalent in OW.

If you're going to be in Dallas and flying AA metal, I think it'd be better for you earn status in AA's actual program anyway. Do the PLT challenge so you can start earning double RDMs and get some status faster. And with two flights a month to Dublin every month, you'll get EXP pretty quickly anyway.