User blog:Beta917/Skeletron Prime

Hey guys, I've been looking into beating skeletron prime, but I'm having a bit of trouble. I go at him with two friends and full Addy armor, but my friends always die immediately, and i can only get him to about half health. Any especially useful buffs or items that I should be aware of? I'm using a Megashark w/ cursed bullets+ranged armor.