Mythic Rules in Pathfinder 2e

I listened to Nonat1's video.

First of all, these are much to specific to the classes, and are so powerful they should be for a higher mythic level.

I would suggest the following:

1. Proficiency -- Add the mythic level to proficiency. This is a small, but measurable, improvement to AC/Attack/Saves/Checks.
2. Quicken -- Roll a d10 at the beginning of your turn. If the d10 is equal or less than your mythic level, you are quickened as per the Haste spell for that round.
3. Flat Checks-- Decrease any flat check by 2 times the mythic level.

These are not class-level specific, nor class specific, but improve for each mythic level.

At the eighth mythic level, the character auto-stabilizes, auto-ends persistent damage, etc.

At the tenth mythic level (almost demigod-like), the character is permanently hasted and has tremendously overpowered defense, offense, and abilities.