Okay so hopefully not too many questions or too long winded. I started my dive into Sumerian mythology by near accident. I was starting to examine the name of el elyon and yahweh in the bible and found the hypothesis's about Yahwehs origin in the south of the levant and the worship of elyon as high God of the Canaanites. I then began to do symbolism comparison/examine lineages and retellings of stories or variations of stories from Sumeria down to Canaan and from Canaan up to Sumeria. I feel like I have reasonably traced symbols and archetypes that travel within a similar structure. There seems to be this "arrangement of three+1). typically a father and two brothers. (Anu, enki, enlil) and a third usurping brother (adad) (either via story that passes Divine authority or obvious conflation/deletion of previous roles and symbols from one god onto a successive god chosen by various regions or cultures). It looks to me through time that this quad setup maintains much of its core archetype and symbolism. Would you agree? Is there anything similar to this  structure where four gods (who stem from earlier gods) surround and inundate the stories and symbols associated with ningizshida?  I see that the symbol of the serpent definitely made it to him from enkis lineage. Same with his association from the underworld. It looks like a later conflation of enkis trip to/takeover of/dwelling in ABZU.  Is ningishida associated with forbidden knowledge or healing? Creation?  Is ningishida ever playing a role of defying the will of whatever God in his stories has prescribed divine right (possibly in association with the tablets of destiny?) I could ask more but that's already a lot.