What seems to be missing from the Watchtower's doctrines ...
Matthew 28:19-20
19 Go ye therefore, and teach all nations, baptizing them in the name of the Father, and of the Son, and of the Holy Ghost:
20 Teaching them to observe all things whatsoever I have commanded you: and, lo, I am with you alway, even unto the end of the world.Amen.
KJV
and the Apostles did just that:
Acts 2:38
38 Then Peter said unto them, Repent, and be baptized every one of you in the name of Jesus Christ for the remission of sins, and ye shall receive the gift of the Holy Ghost.
KJV
Acts 3:6
6 Then Peter said, Silver and gold have I none; but such as I have give I thee: In the name of Jesus Christ of Nazareth rise up and walk.
KJV
Acts 4:10
10 Be it known unto you all, and to all the people of Israel, that by the name of Jesus Christ of Nazareth, whom ye crucified, whom God raised from the dead, even by him doth this man stand here before you whole.
KJV
Acts 5:42
42 And daily in the temple, and in every house, they ceased not to teach and preach Jesus Christ.
KJV
Acts 8:12
12 But when they believed Philip preaching the things concerning the kingdom of God, and the name of Jesus Christ, they were baptized, both men and women.
KJV
Acts 9:27
27 But Barnabas took him, and brought him to the apostles, and declared unto them how he had seen the Lord in the way, and that he had spoken to him, and how he had preached boldly at Damascus in the name of Jesus .
KJV
Acts 16:18
18 And this did she many days. But Paul, being grieved, turned and said to the spirit, I command thee in the name of Jesus Christ to come out of her. And he came out the same hour.
KJV
Acts 26:9
9 I verily thought with myself, that I ought to do many things contrary to the name of Jesus of Nazareth.
KJV
Keep in mind:
Acts 4:12
12 Neither is there salvation in any other: for there is none other name under heaven given among men, whereby we must be saved .
KJV