@Buruch - BA out of JNB are not 5th freedom
I said they were? I only edited the wiki to put in a couple (not all existing) BA Caribbean routes. I also confirmed with BA that codeshare AA flights on Seaborne are not eligible for Avios redemption
That puts SJU-DOM off the table, and perhaps others. But you can still do MIA-PLS-ANU-SKB-MIA for 25k off peak plus about 75-100 in taxes. Those flights would cost at least 1,200 normally.