If you want some roundwoundish zing but with the feel of flats, you can't beat Ernie Ball Cobalt flats. I use these on my thunderbirds, and have just put a short scale set on my squier jag shortie.
All of my mustangs have d'addario chromes.
These d'addario versions are good. Fender & Ernie ball also have their own versions in various colours — I have all three types plus no-name ones & a few old Grolsch ones. The D'addarios seem slightly easier to get on & off than the others.
in red: https://amzn.to/3uQ2wRB
or black: https://amzn.to/4a2C9rT
Its a Squier Affinity with a fake decal and a shítload of aftermarket parts.
A photo of the back of the headstock showing the serial number is conspiculous by its absence.