AP,
I have unfortunately have no insider information, other than asking questions of the recruiters etc.
The numbers per airframe depends on if it is Ultra long range, or not. It was once mentioned that EK crewed 10 crews per ULR, and between 6 to 8 crews for the others. I really don't know what the current state of play is. If I divide the number of aircraft by number of pilots I come up with 18 pilots (9 crews) per aircraft. But this includes management pilots etc so I don't know how accurate that would be. I also have no clue as to the aircraft configuration of new deliveries.
I have not got the numbers of deliveries for next year, but, we have 176 aircraft now and have been told the fleet will be somewhere between 260 to 280 by 2025.
Sorry I can't be more help for you.
The Don