Since you've already booked miles on AA, I would guess you already have either MC with them.
A few years ago, I got a Citi Platinum Select card that was 90K points after $15K or $20K spend.
From that I was able to get 25K points on a $10K Miles ahead savings account for a 3 month deposit
I also get 2X points on most purchases. I funnel most of my expenses through the cards and pay them off each month.
If you're good to go with your spending/cash flow etc., open one in your wife's name perhaps.
It's a little work, but there are deals out there and the miles do add up.
That being said, sometimes it's better to just shop it like crazy and pay up front to avoid the points grab stuff.
If Delta is your deal, they have some good grabs with American Express.