Best Settings for Sea of Thieves on Steam Deck
There are only a couple of minor tweaks for Sea of Thieves on the Steam Deck if you are using the OLED Steam Deck model; if you are using the LCD Steam Deck, the Rare preset will be fine.
For the OLED Steam Deck Use the Rare graphics preset.
Disable blur for clarity.
HDR settings: Brightness at 60, Color Contrast at 56.