Can You Blend Montages Together?

In this video you see a blend-space I made for slash animations. My goal is to allow the player to step omnidirectionally with root motion as they slash, regulated by only 6 animations and the player’s last directional input. The problem is that these are raw animations and it would be much more effective if I could blend the animations in such a way using montages. Does anyone know of a method that I could use in order to produce a result similar to this but using montages instead of raw animations?

This is my initial idea, I would create slots for any two slash directions that I want to blend in between and place them in a layered-blend-per-bone node with the weight being the slash direction.

This here setup hasn’t worked, it just blends the Forward (FR) slash with regular locomotion. I’m also not sure how I would fit the blends for all the slashes neatly into the output. There must be a better way to do this.