Path to Vrh Planj almost doesn't exist - but the ridge where it runs is not hard to follow. I followed it several times from the path coming from Mangart pasture, terrain is nicely passable without major issues. Summit is overgrown and no great views. Orientation is harder on descent. I preferred to stick more to the left (looking down) - towards Mangart stream the terrain is steeper with some drops. Endpoint is always the water intake pipeline for the hydropower plant.