Question on crowds mixing with constrained objects

[jukuhn]

Does anyone know of a way to make a non-rigged agent layer react dynamically with collisions in the simulation? 
 

for example - I have a crowd of agents who are forming a shield wall to block incoming sticky collision arrows. I make an agent layer with the agent and an agent layer of the shield, however since the shield is not rigged I cannot create a collision shape as you typically would with an agent, my only other idea was to somehow make the shield layer into an end object somehow that can then block the sticky collisions but am not sure of how to do this. Any suggestions would be greatly appreciated (sorry for no HIP but my setup has loads of geometry that I don’t feel like attaching)