JFK-EZE would earn 26696 RDMs 20022 MQMs 5339 MQDs 2.05 MQD Ratio
You could route the whole trip on 787s, the layovers can be brutal at times in MEX but you can explore the city and get some good food...
Price is OK, lately I've seen and booked for clients JFK-GRU in the $1850s range...