Anderson's clinical approach is wrong at the outset because it incorrectly diagnoses a Christian's problem as demon possession instead of a lack of growth or disobedience. So whether one uses a reserved or wild method is not the issue.
Christ has delivered all believers from bondage to Satan at the point of salvation. If any past sins have to be dealt with specifically because they are a special kind of sin, then it follows that Christ did not really gain victory over all the believer's sin. All sin has been dealt with at the cross.
The seven steps of Anderson's clinical deliverance approach is presented by him as the key to successful Christian living. Unless one has gone through the seven steps, the implication is that you are not free to grow in Christ. This is disturbing since these steps, arranged in this way, have been uniquely developed by Dr. Anderson. He emphasizes the importance of following and completing each step so that freedom will be accomplished. Yet this would imply that Christians of the past have not really been free to live for Christ. At best, this is highly doubtful.
The seven steps are unique to Anderson because the Bible doesn't teach such a system. Once again, if deliverance were a key to proper Christian living then the Epistles, written to teach a Christian how to live for Christ, would be teaching these things. Instead, silence on this matter speaks volumes.