Sorry I'm kind of a noob when it comes to linux I've only switched over from windows pretty recently. I've been having some random freezes with "sorceress tale" and I don't think it's my hardware. It's usually only when there are enemies. What is ntsync? And how would I know if my kernal supports it? I'm on arch linux with hyprland. Right now for games on f95 on lutris I've just been using runners (wine versions) mostly at random and turning dxvk on and off to see what runs the game best. Is that what you're supposed to do?
It's a bit off-topic and it lacks info. I'll try to answer.
if you have ntsync as a module, you could use "lsmod", if it's not a module but in kernel best would be to check the .config of the kernel.
-ntsync is on 6.14-Rc1 kernels onward, but 6.15 on some distrib. (you could compile it before but not a full version) and needs proton or wine above 10.10 for it to be fully operational on both 32 and 64 bits games. Very basically, it exposes some windows thingies (the "sync. primitives") directly to the kernel and user-space, so it's faster, even faster than windows on some cases. There were a couple of others before, fsync, esync... but this last one takes the things to a whole new level.
(not for you, since you're on hyprland, can be useful to sb else) -if you are on X11 and plasma, you may want to disable the "compositor" while gaming as it can leads weird cycles, I think it's atl+maj+f12, just redo that once done. For the same reason, you may prefer windowed fullscreen, not just fullscreen ( depends on resolution + multi-screen?)
-You could also add the game in steam (the little + bottom left > non-steam game) and use steam as your launcher, that way you can have one fancy library for all your bottles and use the lastest proton-GE (there is a github for it) that has ntsync (not the kernel part, mind you) already in.
-if you have the pb only on sorceress tales (I'l ltry checking later, didn't run it for a while), the game may be badly optimised.
-Wayland/hyprland is still new, some guys have some luck with it with some GPU, some don't : I am in this categor, with an AMD's GPU, I do have some wayland only PC, those with only the intel CPU, but otherwise atm, I'll stick to X11 for gaming, which is a bummer 'cause I want "waydroid" and it's even more of a hassle to make it run on X11. I'd recommend you go X11 for gaming? You just need to logoff and relog into wayland if it's actually needed (for security reasons?). Otherwise, you loose all the good tools, like tdrop, xdotool... The dev. is going faster, so wayland may be more viable in even less than a year but right now...
PS : I mean wayland even have a hard time remembering the windows' positioning...