Honestly that sounds quite ideal, for habits.
What about contact lenses? Any experience with that option? For distance active focus the added peripheral vision can be quite useful.
3rd focal plane, entirely up to you. The only point is to change the focal plane slightly to add new stimulus opportunity, get a bit of distance / habit change opportunity, see what happens. Can be higher or lower, normalized or differential. If you feel already close to blur go up, if you think nice sunny conditions could warrant a decrease, go down. Always zero diopter reset first, consider it an active experiment.