Zeus’s strongest child is Athena.

Homer relates a narrative in which Zeus praises Athena as indeed wise and powerful, but still not his match.

He warns her not to interfere again in his plans for Troy.

Zeus had allowed Ares and Aphrodite to go into battle on Troy’s side because he wanted the Trojans to win until the Greeks had nowhere else to run except to Achilles.

Athena and Hera defied him and entered the fray on the Greek side. Athena helped the Greeks overcome both Aphrodite and Ares.

This caused Zeus to ruefully acknowledge his daughter’s superiority over any deity except himself in terms of strength.

Athena’s strength and skill are also indicated in myth by the story of her birth.

Zeus was allegedly given a prophecy that Metis would bear him a son who would overpower him one day like he had overpowered Kronos.

Zeus swallowed Metis who was already carrying their unborn child. Then the story goes he developed a terrible headache and had Hephaestus split his head open, from which sprang Athena