Dealing with multiple character Animators?

I'm currently working on a mobile multiplayer game where there are 10+ characters.They all have the same basic movement in there animator and they each separately have extra things like abilities and their own attack animation. It's getting very tedious if I need to change a transition or any value that I need to change on all characters. Is there any way to sync all the characters movement nodes? Or any other ideas? Thanks!

 

Animator Override Controllers could help a bit, but the Animator Controller system is always going to be very tedious to use.

This wouldn't be a problem with Animancer (link in my signature) because it lets you avoid Animator Controllers entirely and just play everything directly in scripts so each character can use whatever individual animations they want while sharing whatever animations they have in common. It's entirely up to you to decide where you put each of your animation references.