Since the subreddit got killed, I'll post the settings I'm currently using. I'm getting a mostly-ok 30fps, with dips down to 20. Definitely playable. Shrines can spike to 50-60 fps, which is nice. If anyone has tweaks to improve performance I'd love to hear it.

Using SteamOS 3.4.8 with Stable OS Updates and Beta Client Updates

Yuzu EA 3691 Settings:

Add-Ons- download

'Update 1.1.1'
'Graphics - Shadows - 512x - performance boost'
'NoFog - Performance'
'Steamdeck UI Mod v7- Normal - White'
'Ratio - 16-10 (Steam Deck)'
'FPS - DynamicFPS++-60fps, DynamicFPS, Cutscene-Fix, Vertical Sensitivity Fix'
'Graphics - Island Fix'
'Graphics - LOD Improvement'

General-

Limit Speed Percent: 100%
Multicore CPU Emulation: [x]

CPU-

Accuracy: Unsafe
Unsafe CPU Optimization Settings: [all checked]

Graphics-

API: Use global configuration (Vulkan)
Use disk pipeline Cache: [x]
Use Asynchronous GPU emulation [x]
Accelerate ATSC texture decoding [x]
Vsync mode: FIFO
NVDEC emulation: Use global configuration(GPU Video Decoding)
Fullscreen mode: Exclusive Fullscreen
Aspect Ratio: Force 16:10
Resolution: 1x
Window Adapting Filter: Bilinear
Anti-Aliasing Method: None
FSR Sharpness: 88%

Advanced Graphics-

Accuracy Level: Normal
ATSC recompression: Uncompressed
Enable asychronous presentation: [ ]
Force maximum clocks: [ ]
Decode ATSC textures asyncronously: [ ]
Enable Reactive Flushing: [x]
Use asyncronous shader building: [x]
Use Fast GPU Time: [x]
Use Vulkan pipeline cache: [x]
Sync framerate of video playback: [ ]
Barrier feedback loops: [x]
Anisotropic Filtering: Default

SteamOS Performance Settings:

Use per-game profile: On
Framerate Limit: Off
Refresh Rate: 60
Allow Tearing: On
Half Rate Shading: Off
TDP Limit: Off
Manual GPU Clock Control: On
GPU Clock Frequency: 1200
Scaling Filter: Linear

PowerTools Settings:

CPU-
SMT: On
Threads: 8
Frequency Limits: Off
Governor: performance
GPU-
Powerplay Limits: Off
Frequency Limits: Off
Downclock Memory: Off
Persistent Profile: On

CryoUtilities 2.1.4 Default Settings

I apologize if some of this is superfluous or if I missed something, its been a couple weeks since I set this up. I got these settings from a post on the subreddit and tweaked them a bit. ~~I'd love to credit that user, but subreddit nuke :(~~ Based on /u/Marconobii's guides on reddit

EDIT: formatting

EDIT 2:Added link to mods

EDIT 3: Credit