I heard Draw Out briefly mentioned, and although most people don't look down on it I don't think most people realize how broken it is. Because it is strictly based on MA, giving it to a Wizard with all +MA items is incredibly unbalanced.

On that note, any skill that has an exponential multiplier is fairly easily abused. Though not commonly known, Rafa's attacks do have such and exponential modifier. At 20 MA Sky Demon hits for 400 base, at 30 MA, 750 damage. Randomness still limits it from being and amazing skill, but it does scale exceedingly well in terms of damage.