Well there is a better solution.
Instead of using repeating, since it is not a good technique in our days and you have a significant loss in bandwidth, you can either use one of the bands of the cap ac (2.4 or 5 GHz) to create a PTP link between the two caps or you can create a station mode ( in any of the two bands you want ) on the second cap to establish a PTP link again and then create a slave interface to use as an AP…