I’ve yet to finish reading but can the tablets of destiny be gained from Tiamat? Any have experience with such tablets? “The body of Marduk was filled with an ever-blazing Black Flame, for this was the gift of Tiamat to all her offspring.” Can this be tapped into?
Check out the Grimoire Of Tiamat By Asenath Mason. Also try working with her its a good idea to get to know her before asking her for favors.