I would imagine the 19 and its upgraded derivatives coupled with the VF-171 would parallel the Hi-Low mix of fighters of the F-22 and F-35 in the real world. A small number of Excaliburs would establish space superiority for the flexible 171s that could act as missile boats, recon etc.
Well, at least in my mind it seems rather fun to picture them working together.
And of course, the VF-22S++ would be the specfor mainstays but I'm OT.