If Mormons are reading FR, I can guarantee you that your approach isn't going to be effective.
Mormons are the legalists of our day. The group most comparable to them were the Pharisees and Teachers of the Law during Jesus' three-year public ministry.
Go ahead and read the end of John 8, where Jesus equates the Pharisees with being sons of the devil; and then read all thru Matthew 23...where Jesus talks about how the Pharisees will traverse land & see to make them twice the son of hell...and how they are whitewashed sepulcres -- graveyards on the inside.
Then you can likewise go ahead & tell Jesus that you "guarantee" that His approach wasn't effective with the Pharisees and Teachers of the Law, either.
Simply...people who fail to distinguish who they are trying to reach...fall into this error of yours.
A repentant alcoholic who believes he was born with a predisposition to alcohol is approached distinctly from a non-repentant homosexual who believes he was born with a predisposition toward other men. A repentant homosexual who believes he was born with a predisposition toward other men is approached distinctly from a non-repentant alcoholic who believes he was born with a pre-disposition to alcohol.
The same can be said for pagans searching for THE True God (Acts 17, Mars Hill) vs. how Paul & Apollos dealt with the religious Jews in the synagogues...read Acts 17, Acts 18, Acts 19, for example.
Paul -- and Jesus -- both comforted the afflicted; and they afflicted the comfortable. Jesus said the Physician is for those who see they need to be healed; and believe me, being the descendant of a Mormon polygamist, there's not many temple Mormons who think they need to be spiritually healed.
A person with cancer can't be comforted if they are in denial about the cancer. The diagnosis must first be brought home -- and accepted -- before the Gospel of comfort can be introduced. The Law precedes the Gospel for us all; but ESPECIALLY for the legalist.
Your "guarantee" offered up means you have placed yourself in the position of "Spiritual Judge" of others' ministry and are now a duly self-appointed "personal Holy Spirit." The Holy Spirit doesn't need our help. (I suggest you resign that position effective immediately)
I am not sure how you could be more wrong.