User blog comment:Jedward2002/Mechanical Bosses/@comment-4953754-20120412110335

You just need a Mithril Armour with the Helmet (more Defense) and a fast and good sword for melee like the Cobalt Sword. For the Destroyer, I used something that can hit multiple times per hit like a Magical Harp or some Grenades. For the Twins go to a server with a friend and make the eyes get sepparated, then both use the Cursed Flames Spell and Dao of Pow. For the Skeletron Prime just use something fast like Megashark and some Cursed Bullets or you can use Cursed Flames Spell. Hope it helped :)