This week the Miami flight has been arriving a little ahead of schedule but there are so many things that could go wrong.
More or less at the same time you have a Lufthansa 747-800 arriving as well as two wide bodies from Madrid.
If you are first in line you can be through Passport control in ten minutes , but if you are last of the 4 , it could be anything from 30 to 60 minutes
Customs is also a lottery / anything from 5 -30 minutes.
Checki in for the Ushuaia flight will also around an hour before .
Its a vero close call and one that i would not be comfortable with.