I beat him on the first try! I used:
Armor: Full Molten Armor Set
Potions: Ironskin, Regeneration, Pad Thai, Endurance Potion, Regen (Campfire), Regen (Heart Lantern)
Weapons: The Bee's Knees
Accessories: Lightning Boots, Eye of Cthulhu Shield, Hive Pack (2 others that I cant remember)
He is...