BNA to HNL

So currently I have two AA rewards accounts. (75,000 points gets one round trip per person)

Account #1 (wife's account) has 155,000 miles on it. I am able to book 2 first class trip tickets with no problem.

Account #2 has 383,000 miles attached to it. I can easily go in and on the same flight book 2 more first class tickets, but when I try and do more the mileage changes on the aa.com website it changes the value to 67.5K for a one way ticket.

There are plenty of seats on the dates that I am looking. Do I need to book 2 on each account now (4) then book 2 more in a month?

One alternative is that I have plenty of southwest points to fly to another city and fly aa.com from another city. Can I book tickets for some people departing from BNA and go to DFW via southwest. Then book the rest of AA departing from DFW to get everyone the discounted points?

Is there another options that I am not considering?

Thanks in advance