Mental: Fire Mage - The traditional magical artillery. Fragile, can't wield regular weapons (well? Agility: Thief - Lots of skill points, can get most of the movement and detection skills (climb, hide, see traps, listen etc) for cheap. Opens doors, sneaks around, disarms traps,. Physical: Fighter - Wears armor. Hits slime with pointy metal. Social: Diplomat - Grants bonuses to party. Gets better rewards from NPCs, and unlocks quests earlier. Can intimidate enemies. So the points between the corners are.