To me the ideal JFK trip is departing from Terminal 4 and arriving back at Terminal 2.
The Centurion Lounge at Terminal 4 is very nice and comfortable. I always leave enough time to do a more leisurely walk to the gate after leaving the lounge. So it is long but not stressful.
On return getting out of Terminal 2 is fast and easy and I don't care about any of the amenities.