I my self and a pentacostal, I have spoken in tounges and have been baptisted with the holy spirit. I have enounters direct spiritual attacks on my self and have, through the power of jesus christ ALONE, drove them out of my room. I have never excorsied someone, that requires a level of spiritual maturity have not attained. But i do believe that all christians have the power to drive demons, but many do not know how to handle them. Ill tell you from personally experience that if you are not absolutly sure in your convictions and faithfull that God has forgivin you of all your sins, the demon or devil will use it against you. It will mess with you mind and cause a fear that words cannot explain. It requires maturity and experience to do so.