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.
You [Bobby], on the other hand, have had much experience in using prayer to help solve crises, going back to your college days when your ceaseless "Hail Marys" helped deliver your friend Susan from the devil in what you later realized was her exorcism. As I'm sure you recall, Governor Jindal, Susan's depression about her cancer quickly progressed from depression into despair, and you found yourself in a room with her and a bunch of Campus Crusaders for Christ and other well-meaning but green evangelicals, wanting to help but unable to do so. When you tried to join in the group's prayer, you felt "a weight on your chest," and initially could not overcome the darkness that was now taking ahold of your soul as well. But according to your 1994 article "Beating a Demon, Physical Dimensions of Spiritual Warfare," "suddenly...and strangely, I found myself repeating the Hail Mary until it became a chant. As a recent convert to Catholicism, I had yet to accept the Catholic doctrines concerning Mary, and considered [them] to be idolatry. Though I had never prayed a Hail Mary before in my life, I now found myself incapable of any other form of prayer." But as it turned out, it was your prayers, along with the intervention of a crucifix (later found to have been blessed by John Paul II) that turned the tide for Susan, and her faith in Christ was restored. Link