Iaido Class?

[MrStabby]

If the class is about awareness, it sounds like it should be using the insight skill.

I could see something like:

At third level, if you have proficiency in insight your proficiency bonus is doubled when you use this skill.

You whenever you roll initiative or attack with advantage you may instead make an insight check and use that result instead.

At seventh level, the on your first turn after rolling initiative, if you take the attack action you may take the dodge action as a bonus action.

At tenth level you may use your wisdom modifier instead of any other stat modifier when making a save, as long as you are conscious.

At 15th level your first hit against each enemy in your first round of combat is a critical hit.

That said, I am picking up the flavour from what others have said, so I could be wildly out.