Perhaps you should consider Hebrews 2 and 1 Corinthians 15 and see how this Psalm is fulfilled. David’s victory over Goliath was a foreshadowing of the greater victory over the flesh, when Jesus crucified the flesh and overcame sin in all its manifestations.
I believe that El Shaddai represents the Strength of the Powerful Ones, and indicates that God the Father, Yahweh, El, is the power or strength behind the angels that visited Abraham, and Abraham witnessed their strength to sustain, to help, and if necessary bring judgement on the wicked.
As I stated before I was introduced to some of these concepts when I was 19, and I am a bit older now. I am very reticent to accept the word “morphs” as it implies to me that God the Father changes and becomes something else. I believe that God the Father has a Son, the Son of God, not God the Son. Thus Exodus 3:14 is “I will be”, not “I AM”. I have already mentioned that Ehyeh is translated as “I will be” in Exodus 3:12 in the KJV, and in Exodus 3:12 and 14 by Tyndale, and Exodus 3:14 margins of the RV and RSV. You are a Hebrew scholar and could check this with your knowledge of the original languages, but you want to maintain your Trinitarian bias when it suits your cause. I also drew attention to the association of the future aspect of the Name Yahweh with the future deliverance of Israel out of Egypt and their inheritance of the land in Exodus 6:1-8.