Your resolution will present some issues, because these cards are meant more for 1080P or 1440P in the case of 6700XT. There’s lot of pixels to render at 4K for these cards. Not to mention a game like Darktide.
Since you got the 9060XT, definitely use FSR4. The driver will have an option turned on automatically, if not you turn it on, to update the game’s FSR3.1 to FSR4.1. Set it to Balanced or Performance. The image quality should be good enough I would say because of your screen. I think on Performance your GPU will render at 1080P internally then upscale it to 4K. Which it should be able to do.
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They should help stability. I run a 9070XT, but on a smaller 1440P screen and a Ryzen 5600, quite similar to your CPU, slightly slower though. The game has some FPS drops in really high intensity situations, but for the most part it runs well.