Put abilities that require a specific stance in it’s own stance. For example charge, Overpower and mocking blow can only be used while in Battle Stance so you put them in Battle Stance’s action bar.
while other abilities like heroic strike, shouts etc… don’t require a specific stance to be able to use them and it’s better to put them on multi action bars.
Some abilities like Hamstring and Execute share 2 different stances so make sure you have them both inside their own stances with same keybind.
I hope this was helpful.