To give the entlings more character and purpose they could try to rescue saplings that they come across in your storage. Pick them up, run out of town and plant them. The once that don’t have a sapling to carry might choose to serve as escort.
If they find to many saplings for them to carry they could choose to plant them close to where they found them and hold their ground to protect them.
Don’t know if it rimes with the lore but it could turn out interesting if they plant the saplings to grow more entlings and stay with them until they are ready to fight for them selves.