I also beat him today with just 5 hp left solely because i had my death defy up still and i had like 30% chance to dodge dmg when i was sprinting near him every now and again, at one point i dodged like 2 or 3 instances of damage in a row lmao
Made it to him with such a good build, incredibly high dps Aphrodite boon attack sister blades with the Omega Attack boosted super high from a hammer and 8 uses of 55 HP moon water. Only got like 75% of the way through the first healthbar ;-;