Yes, Edgar Cayce did have a very powerful asteroid placement, that too with Asteroid Atlantis. Not surprising...
He had Uranus 150 degrees from Atlantis and Pluto trine (120) on Atlantis. As a bonus, he has PALLAS conjunct Atlantis with 0.04 degree precision, boosting his complete wisdom and mastery of the Atlantis Civilization.
Asteroid Pallas has a powerful link with the Pineal Gland activation in
psychics. A trine to Pluto eases transformational knowledge, and we all know
that the knowledge of Atlantis was popularly seeded into collective human
consciousness by none other than Cayce.
Incidentally, he also had SIVA-KAALI-SPHINX conjunct in Pisces, the sign of the dreamy mystics. These asteroid placements are the only evidence from his chart about mystic powers. From his normal chart, no astrologer can say that he is a very powerful
mystic, they will at most say that he has a little psychic ability due to the
Sun in Pisces. 500 million humans have the Sun in Pisces, and we have only one
Edgar Cayce.