Blend Pose by Bool Animation BP Outputs

Hello!

I am trying to set multiple blend poses by bool to an output. Is this possible or am I trying to make things more complicated.

I want one blend pose with a block/walk output and another blend pose with a attack/walk output.
I want to make it transition by using a character state.

How can I connect these both to the output and switch between them?
At the moment only Block works because it has the Main pose output. If I copy the Main pose output and add to the end of the Attack bool, it never gets called only the first Main pose does.

Please help, I have included the image for better understanding.

Thank you in advance.