If you run out of shadow map precision then there is currently nothing you can do to increase it. The only option for now would be to replace your local light by a sun light.
In the future, I want to make the spot lights with shallow cone angle focus the shadow map projection. This would allow very sharp shadows of distant local lights.
This is a bug that I am aware. I’ll be fixing it shortly. But do be aware that shadow resolution is scaled down internally during animation to avoid shadow update overflow.