Main attribute: Here enter your Intelligence (Mage), Dexterity (Scout) or Strength (Warrior). IMPORTANT: enter value without the bonus from the weapon. If you are wearing a weapon that adds points to your main attribute, remove it for a moment and check out value without it.
Weapon - Minimum Damage: As shown on image below, number 1.
Weapon - Maximum Damage: As shown on image below, number 2.
Weapon - Additional main attribute: As shown on image, number 3. Enter only if the weapon has an additional bonus for your main attribute - Intelligence (Mage), Dexterity (Scout) or Strength (Warrior).