It’s very important when working with simulations to be systematic and deliberate. Sim Cage, Sim Cage Ref, Render Mesh, Blend-shapes, hair follicles and more, all come together in a nest of variables that tend to be quite fragile. Simulations are often an exercise in slowly refining variables in order to get as close to a perfect result as you can, and when you’re running a heavy simulation tens of times, you need it to be as robust as possible.