Long, narrow stances are not combat stances. They were designed for performance.

The deep, horse stance is not for combat either. It is intended to build strength in the legs.

A realistic combat stance enables you to be pushed firmly from all sides without any loss of root.
It allows freedom of movement.
It keeps the joints and spine mobile and loose.

Find the stance that allows you to use your body in a smooth, natural, spontaneous fashion.
A stance that easily facilitates walking.