Instructions
Specialize at least two character's skills in defensive, tanking abilities. Defensive abilities, such as "Taunt," keep foes from attacking other teammates, which is useful for protecting those who do not have a high defense. If you have a character who specializes in a hand-to-hand combat and has a high defense rating, they would make a natural tank.
Specialize the skills of one player into healing abilities. It is very important to have a designated healer when completing the Underworld on Hard Mode, as the defensive characters will lose their health quickly. Specializing in a traits that increase mana regeneration will also help build your character.
Specialize the skills of two of the characters to maximize their damage output. Traits like Strength and Agility can dramatically increase the damage your character causes. Also, choosing skills that deal a lot of damage early are typically of character builds that specialize in damage output.