I see the distinction between shamanism and mysticism being that the mystic is much more focused on the trans-rational than the pre-rational, while the shaman isn't so willing to make distinctions, but I do see a lot of overlap. Still, it seems like a shaman would more be a practitioner of magic which a straight mystic might not practice. Anyway...
I love this dialogue pre- Sodom because it shows Avraham having power to confront God and change His mind. It's as if God and Abraham are palling around, just talking. "Eh, I was gonna destroy the city." "You know, there could be righteous people there." "Yeah, you got a point." And so on.
There's a teaching, I think from the Dubno Maggid, that when it says righteous men in the city, of course there were righteous men in the city! But it means among the people, and they weren't among the people, they were all staying off in their studies, sequestered from the world, and because they separated themselves it is for this reason Sodom was destroyed.
Let's look at this section:
Chapter 19
1. And the two angels came to Sodom in the evening, and Lot was sitting in the gate of Sodom, and Lot saw and arose toward them, and he prostrated himself on his face to the ground. 2. And he said, "Behold now my lords, please turn to your servant's house and stay overnight and wash your feet, and you shall arise early and go on your way." And they said, "No, but we will stay overnight in the street." 3. And he urged them strongly, and they turned in to him, and came into his house, and he made them a feast, and he baked unleavened cakes, and they ate. 4. When they had not yet retired, and the people of the city, the people of Sodom, surrounded the house, both young and old, the entire populace from every end[of the city]. 5. And they called to Lot and said to him, "Where are the men who came to you tonight? Bring them out to us, and let us be intimate with them." 6. And Lot came out to them to the entrance, and he shut the door behind him. 7. And he said, "My brethren, please do not do evil. 8. Behold now I have two daughters who were not intimate with a man. I will bring them out to you, and do to them as you see fit; only to these men do nothing, because they have come under the shadow of my roof." 9. But they said, "Back away." And they said, "This one came to sojourn, and he is judging! Now, we will deal even worse with you than with them." And they pressed hard upon the man Lot, and they drew near to break the door. 10. And the men stretched forth their hands, and they brought Lot to them to the house, and they shut the door. 11. And the men who were at the entrance of the house they struck with blindness, both small and great, and they toiled in vain to find the entrance.
http://www.chabad.org/parshah/TorahReading.asp?AID=9170