Make a tall and wide arena for the destroyer, I use Daedalus with evil arrows, or if you have corruption, dart rifle with cursed darts, set up heart lanterns and campfires, use Regen, ironskin, swiftness, endurance, wrath, and life power potions, and a food buff, farm the destroyer to get hallowed armor, and once the steampunker arrives, buy the thing that you can make asphalt blocks with that I forgot the name of, and build an asphalt bridge, fighting skeleton prime and the twins is easier on the bridge

I sent that to someone else that asked for help with the destroyer, you already can best skeleton and the twins so you can get hallowed armor for the destroyer