Well AB is going belly-up so I wouldn't put the miles there...
Where are you pulling the $1000 for the AA challenge? I think it costs $200 for the Plat challenge but the EQD requirement is $2000 which you may well get from that one trip above depending on how much it cost. More details on AA challenge from TPG:
https://thepointsguy.com/2017/01/aa-...tch-challenge/