Well, first off, I'm guessing you're melee? Get a powerful melee weapon, like terra blade, North Pole, etc. vampire knives also help, as RockinRed Reaper said. Dragon armor is good. You'll want faster wings, spooky at the least. Fire gauntlet can replace lava waders. Instead of water walking boots, build an arena above the ocean made of asphalt. Heart statues are good, but connect them to a pressure plate as you run past. Switch between your powerful melee weapon to vampire knives on and off throughout the battle. Avoid sharknados and cthulhunados, keep him onscreen the entire time. Reforgeing all accessories to warding, for defense, or menacing, for dps, your choice. Good luck!
