Actually have 4 Delta AmEx cards - Personal Platinum (20K MQM) & Reserve (30K MQM) and Business Platinum (20K MQM) & Reserve (30K MQM) . Probably run $500K plus on these each year so that is 100K MQMs then fly the other 25K - 40K depending on year and long distance. Lot of short haul stuff around South East with 8 - 12 NYC runs a year.
Not elegant but gets the job done. Worse comes to worse I bounce between PM & DM every other year. Use the miles for the kids and upgrades and sometimes hotels & car rental.
Learning a lot on this forum...appreciate the advice as I figure out how to maximize everything.
FH