Terraria Master Mode Dungeon Guardian

Since 1.4 is out, I went ahead and decided to try and kill the Dungeon Guardian. Unfortunately, it takes quite a while to kill it; it took me about 11 minutes to whittle down the Dungeon Guardian's health to around 5,500 until it cornered me into a tree and eviscerated me. I used Zenith and Celebration MK2 to try and kill him down and also the Witch's Broom mount from the expert mode Pumpking. I also had 2 Terraprismas doing extra damage too.