We have also seen it with Elsecallers
As much as I love the idea it would probably be better to just use division more as conservation of mass/energy/investiture is a thing.
I have a similar idea. You got them to soulcast a large number of sharp crystals in the heat of battle and then use a reverse lashing so they fall to a spot near the enemy leaving them with a bunch of sharp pieces of glass embedded in them.
A windrunner getting some force behind an edgedancer could be interesting. The edgedancer does not need to slow down so they could keep moving at full speed for as long as they have stormlight.
Finally, I know this is not what we are all thinking but I think some mixture of Skybreaker, Lightweaver, and Edgedancer skillets would be perfect for criminal proceedings.