Although the 3rd region had Class 2 Magical Beasts, they all had low attack powers. To a Saint that could condense a Saint Weapon, although it may not be possible for him/her to fight against the magical beast alone, as long as a few people worked together, hunting magical beasts within the 3rd region shouldn't be very difficult to do. It should definitely be easier than a student that had not yet reached Saint level killing a Class 1 Magical Beast. After all, the Saint Weapons that Saints had were extremely powerful, and far surpassed those other ordinary weapons.