Don't see any sense in upgrading the items after +9? Items on the MUX Legend gain additional options when upgraded from +11 and higher! Excellent weapons:  +11: Increased attack power +2% +12: Increased attack power +2% +13: Increased attack power +2% / Elemental DMG increase +5% +14: Increased attack power +2% / Increase Critical DMG Rate +2% +15: Increased attack power +2% / Increase Excellent DMG Rate +1% Note: Classes that uses only 1 weapon - it gives +4% per each le