AM has a ton of deals right now in business which make it easy to rack up miles.
I just picked up
JFK - SDQ in (I) for a touch under $600 which will net...
Miles flown: 8036
MQMs: 12054
RDMs: 25714
MQD @ 40% = 3214
You can also stack two back-to-back in one multi-city trip which seems to make the total price lower than two separate tickets.