Currently the smallest object in vanilla that can be used as a Rope Parent (creating a rope with it as the origin) is the UAV Darter drone. Scripts toggle hideobjectglobal to hide it, but it is still somewhat inconvenient to be spawning Darter drones just to create a rope origin.

We need an invisible object with no display name, maybe which inherits from the drone but with empty model. It needs good simulation frequency for things like fastrope. Most big mods (ace3) have created their own invisible object for these purposes, but those of us who run vanilla don't have such luxury.