The Dominations of Heaven
These angels of kingly authority are tasked with the duty of governing and making known the Will of God unto all the lesser angels of inferior rank. They are the highest Choir of the Second Heaven and thus, receiving the Divine Ordinances first, duly promulgate the Divine Directive down, being ordered and ordering according to the Divine Will.
These angels, the lords of Heaven, being first and highest among the rankings of the Second Heaven are wholly separated from all material concern governing over the Heavens and the angels therein. Thus, with the Choir of Dominions the Celestial Hierarchy is actually self contained, containing within itself the very governance of the angels. Meaning through the First Heaven man is attended to as individual, family, and nation, while through the Second Heaven the entire Universe is attended to as nether, visible, and invisible. Leaving only God Himself to be administered to.