Mostly low/medium settings, drop the resolution to 1024x960, enable FSR in the Deck’s settings, cap the framerate to 45 FPS and it’ll mostly stay there.
I’m usually really sensitive to anything below 60fps but for some reason it feels very smooth and playable this way.
It plays okay ish on low settings in docked mode. I wouldn't try it in handheld. 20-30fps usually. All my 500 hours are not on deck although a healthy portion of them are.