Easy way to use Blend nodes in Material Layer Blends?

Coming from avid Photoshop use, it seems a no-brainer that Material Layer Blends should have simple access to using Blend nodes (overlay, screen, linearburn, colordodge, etc) and a way to adjust the amount of the blend. I tried but it doesn’t really seem to be working. Here the grey color theoretically would allow me to adjust the amount of the blend but that didn’t really pan out either.