I don't think any of them are valid - regardless of how much water you involve or who is performing the ritual, I see no evidence of some special magic status being conferred.
Most Protestants do not believe baptism gives some type of "special magic status". I certainly don't believe that I now have some type of "special magic status" that I did not have prior to February 12.
Then why do it?
Already been explained. I wanted to make an affirmation for myself, not just because my parents wanted me to like my childhood's confirmation.
That's not an answer to the question. Why hold this bizarre ritual at all if it doesn't somehow get you in good standing with your deity?