Interesting thoughts.
Personally, I see angels bound in Tartaros as simply meaning they cannot be redeemed nor recovered.
Also, I believe the sons of God in
Gen 6 are not angels who fell, but were Seth's lineage contrasted from Cain's lineage who met after we read in
Gen 6:1 that men spread over the face of the earth. Cain's people were separated from Seth's people due to Cain's banishment.
I see the GIANTS as simply a Hebrew term for GREAT in the sense of GREAT sinners. Very extreme sinners.
,,,for the record. But you could be right, Aquila~!