I wanna move away from pamac since it doesn’t support the AUR (for example I have some installed AURs from there that don’t show up when using yay) and it doesn’t refresh the mirrorlists. Any suggestions?

There are only 3 GUI options that provide a full experience. pamac, octopi and bauh. They are all very different. Since you have ruled one out, I would just try the other two and see which you prefer.