The phrase "king of kings" was a title, meaning that he was the greatest of kings, the king that other kings obeyed. AT: "Nebuchadnezzar king of Babylon, the greatest king" (See: [[rc://en/ta/man/translate/figs-explicit]])
Possible meanings are 1) "your daughters" refers to the young women of Tyre who were working in the fields or 2) "your daughters" is a metonym for nearby towns and villages on the mainland that supported the main city of Tyre. See how you translated a similar phrase in [Ezekiel 26:6](./05.md). AT: "your daughter communities who are on the mainland" (See: [[rc://en/ta/man/translate/figs-metonymy]])