Saint Dominic had them all say the Rosary very slowly and with great devotion, and a wonderful thing happened; at each Hail Mary that he and the people said together a large group of devils issued forth from the wretched man's body under the guise of red-hot coals [this particular man had 15,000 demons because he had attacked the fifteen mysteries (this was prior to the Luminous Mysteries) of the Rosary].The devils went on to scream at St. Dominic that the Rosary was like a chain that beat them and whipped them.
No, we wouldn’t use a Rosary but we do use Holy Water and Annointing Oil. They work just fine because we understand what actually makes them work.