Does the 'Normal hit damage to monsters + 20%' effect work on 1 hand or 2 hand sword /blunt weapon?
here is the skill description (L2wiki which is same as description in our game)
Superior Sword/Blunt Weapon Mastery - P. Atk. + 30%, Additional P. Atk. + 1027, Atk. Spd. + 30%, P. Critical Damage + 15% when a sword or blunt weapon is equipped.
Superior Dual Weapon Mastery - P. Atk. + 30%, Additional P. Atk. + 1027, Atk. Spd. + 30%, P. Critical Damage + 15% when a dualsword/blunt is equipped. Normal hit damage to monsters + 20%. Chance to activate Physical Pose during a normal attack. Depending on STR, your STR can reset cooldown or double skill effect duration.