The best part was that the class itself was awful as a main (their speed was crap, they couldn't equip anything that wasn't crap, etc.) but once you learned enough Math Skill to put it as a second ability on whoever else, you had a holy terror on your hands.

My end-game party included a Chemist (yes, you know, basic starting job Chemist, because they can equip guns and don't need Throw Item to throw items) with Math Skill as a second, and he was almost as broken as Orlandu.