From the Tilisunahütte, follow the signpost towards Partnun (1.5 hours). You go over the Tilisunafürggeli and mostly follow this meadow path until the entrance of the family via ferrata slightly above the Partnunsee.
Before you reach the entrance of the Partnunblick via ferrata, I recommend warming up by approaching via the family via ferrata.
The descent takes place on a marked hiking trail. Afterwards, return along the same path back to the Tilisunahütte.