I would say there is a huge range of operating speeds and heights that are suitable for both the J-15 and the TA600. Remember that the turboprop powered KC-130 manages to refuel the F/A-18.We are not interested in minimum speed and maximum speed. You want to be refuelling at a height and speed that is convenient to the thirsty aircraft and at that condition the refueller itself should be at a comfortable cruising speed and height.
I can imagine war games being played on a computer system using these things but I can't image these being developed before much more experience has been acquired. After that it will be considered if there will be a likelihood that there will be occasion to use these if they had been made available and that use and its likelihood is set against the costs of such a program - the buying and maintaining the aircraft and everything belonging to them, training the crews, bases, adapting the AOR's, &c.