If you reset from level 60, to which level?

Instead of resetting you could also use one of the self-study tools like the self-study quiz script or the self-study function in Flaming Durtles. If you choose to review all items (including the burned ones) you get a random refresh of all WK items without going through the whole SRS process again.

You may even want to unburn the items you don’t remember, so that those are reset to apprentice status.