The sheut is for many things. It is the shadow one leaves on the world and can persist even after Ammit devours the ib.
So from spellwork perspective, yes, it is a way of infusing one's self in their work. It can also be a target for advanced necromancy if one wishes to secure a beyond final death. However, I suppose it mostly persists for Osiris, serving as something of a backup should he care and require.