Well, first of all, getting back to your original question, it seems that the term Annunaki applies to two different groups, Enlil and Enki, and everyone else in the Sumerian pantheon. According to the transcripts:
940930 said:
Q: (L) Who were Enlil and Enki, the Annunaki of Sumerian stories?
A: Great teachers.
Q: (L) Were they human or extraterrestrial?
A: Extraterrestrial.
Q: (L) Where did they come from?
A: Cassiopaea.
Q: (L) Was the human race genetically engineered to be slaves?
A: Yes.
Q: (L) And who were the genetic engineers of this slavehood?
A: Lizard beings.
And then there is:
941007 said:
Q: (L) How did the people of that planet[Kantek]come to earth? Did they know it was going to be destroyed?
A: Some knew and were taken by Lizzies and they are the Annunaki.
So originally the Annunaki seemed to be an STO group that visited the planet and attempted to enlighten humanity. It seems the Reptoids got their foot in the door by masquerading as these beings and then subtly twisting the teachings which resulted in the enslavement of the Sumerians. William Bramley, in his book the Gods of Eden, details how Enki appears to be the first 4th density STO being to contact humanity in recorded history. He credits Enki with offering spiritual and ethical knowledge to mankind and attempting to show them how to evolve their own knowledge rather than rely on some external savior to impart it to devoted followers. He is depicted as a Prometheus figure and wasn't liked too much by the other "gods" for whom the humans were only beasts of burden. These latter-day Annunaki, whom the Sumerians confused with the original teachers went on to create the personas of Yahweh, Allah, and all of those. Annunaki, in effect, is just another name for Reptoids although it seemed to originally apply to a different group.
As far as your question about Satan is concerned, I think he is a straw man conceived to convince humanity how Jehovah/Yahweh is so full of light and goodness. Satan was created to be obviously evil so that people would see him as a clear rival to Jehovah/Yahweh, while Jehovah/Yahweh is more subtle and calculating. The constant spectre of Satan coming to steal your soul rallies the people under Jehovah, who is portrayed as good, so they won't be dammed for all eternity. No one stops to consider whether or not Jehovah is the one who is actually stealing souls, or most don't anyway. Like the Annunaki twist, there does seem to be a dual meaning for Satan as well. In the book of Genesis, humanity plays the role of Lucifer, according to the Cassiopaeans. Eating the fruit of knowledge and giving into the serpent is symbolic of a deal we made with the Reptoids. Apparently, they offered us a more physical existence because they said it would accelerate our learning cycle. As soon as we jumped into physicality, we began to seek to possess and control and in many ways became like them. Eating from the Tree of Knowledge was "sinful" because it embodied the concept of there being a one supreme source of all knowledge, which logically leads one to the idea of an almighty God who controls everything and therefore must be pleased with you in order to grant you the additional knowledge you need to grow. The serpent became "God." Contrary to what the bible claims, we didn't really have a God prior to the eating of the "fruit." As I understand it, there were just various 4th density teachers that told us how to work on ourselves and unlock the knowledge within us.
It is difficult to answer questions from a "biblical standpoint" because the concept is so limiting. As I have stated before, the line between Jehovah/Yahweh and Satan is sketchy, but I don't think they are exactly the same. Satan, as described in the bible, is a completely illusory threat in order to instill fear and obedience to the Yahweh cult. There may be a few Satan worshipers and a couple of 4th density entities out there who will "humor" them, but the biblical Satan is strictly an idea implanted in the minds of men. On the other hand, you could say that Jehovah/Yahweh has many satanic qualities.
1. I am omnipotent. You're either with me or you cease to exist (die spiritually). [The opposite is true, in the long run.]
2. You must obey me, your master at all times. If you please me, you will be rewarded, if you disobey me, I will judge or kill you.
3. I created you and therefore control your destiny. You are lucky I allow you to exist. This alone is cause for your undying adoration to me. I can always take that away from you.
4. You pitiful humans were born into sin. I am the only one who is powerful enough to save you from your wretched existence.
5. You shall have no other gods before me, for I am a jealous god. [Here I think Yahweh makes a major slip of the tongue because he implies that there are other gods and other ways. Everyone is too mesmerised by his authoritarian spiel to notice, including Yahweh himself]
6. You must spread my word far and wide, by conquest if necessary, so that all may know of the divine opportunity I present to the world.
7. Suffering, toil, and enslavement are part of my broader plan to lead the chosen few to salvation. You do wish to be chosen, don't you? Then follow rules 1-6 and I'll consider your application.
Once you strip away all of the niceties and "good shepherd" nonsense, this is basically what God is telling his followers. When you make a deal with God, you are making a contract with a Dark Lord, so you could consider him a devil in a sense. From an esoteric viewpoint however, I don't believe Yahweh, or the entities behind him, are THE Satan. Satan could more accurately be described as the thought center of non-being, which constantly pulls souls into greater and greater darkness until they implode. As far as the grand delusion goes, I would say the answer is all of the above. Delusion#1-God is good, delusion#2-Monotheism is the truth, delusion#3- The Bible is the word of the almighty, benevolent God...Yup, all delusions.
