Outer edge of cut issues - Need help

Struggling to find a solution for a common problem. I typically work with multilayer svg files with different layers. I have everything set for the depths i want, but can’t find a way to apply a last layer that cuts out the outer edge of the shape. In many cases the outer edge is composed of layers that also have interior elements, so setting the depth all the way through would mess the interior up. I’m sure this is obvious, but I’m still leaning my way around Easel. It’s worth nothing that the layers were already created in the files at import.