The twins...
My friend plays ranger, and he has the Megashark, Uzi, Stormbow, and Flamethrower, and pretty much facetanks them offscreen. However, I just stand near my statues and blindly fire my Poison Staff. When he dies, the bosses go to me, and kill me, because I'm a squishy wizard. However, I only have a good arena and no buffs, so yeah.