This may be sort of strange, but Edgedancers could be a strange form of Spider-Man on Roshar. Think about it:
They could use their control over the surge of friction to make their hands and feet "sticky" in order to climb walls.
Absorbing Stormlight gives them the strength, agility, and reflexes that are characteristic of the web-slinger's fighting style.
Their ability to grow and direct plants/vines could imitate web-swinging.
Granted, it would take an enormous amount of Stormlight to do so, but I could see Lift using her odd abilities to make it work without an entire backpack of spheres to draw from. As an aside, this is what happens when you binge-read two 1000+ page books back to back, and then get a night of next to no sleep.