Good evening. Indeed, King Tolgar uses a different movement animation, but unfortunately, it is not compatible with standard heroes. In fact, this animation is also not very smooth and is similar to the standard one.
And another question, as I understand it, the animation is not tied to the appearance of the model, i.e., for example, you can use a mod for individual heroes, and they will all move smoothly; the important thing is that the movement points of the models coincide?
By the way, for Mages, elephants are the closest in type and configuration of models; maybe try with them.