Changing between animation states using different blend spaces?

Hi wonderful people!

I’m struggling to find the right answer for changing between a combat set of animations and then non-combat states.

I’ve currently got a basic locomotion state machine set up and then have animation montages for combat. However, I want to change the idle and run animations when a weapon is equiped. I know from this video that using different state machines for this isn’t ideal, how would I go about doing this another way?