Take a virgin wife before a servant with child
To be efficient and not feed the seed of non circle men children. Make sure you marry and have children to a virgin wife first. Listen to Moses only virgins are permitted for you to marry. Women with other men’s children can only be servants after you are married and had children.
But if you can’t find a virgin wife of your own people. Have children with a defeated and recruited girl of the right hand possesses with other men’s children. Defeat the other sholva man.