DXB: Dubai International Airport serves the most international passengers in the world, but inexplicably does not have any designation as an international hub at all. Considering it's busier than London Heathrow (
https://en.wikipedia.org/wiki/List_of_busiest_airports_by_international_passenger_traffic), I propose an international hub charm of 90.
DOH: 18th on the list, but does not have any international hub boost either. Propose an international hub of 35.
JFK: Actually below DOH in terms of passengers, but inexplicably has 80... 35 is probably more appropriate.
AMS: Propose international hub of 70.