MoonMystic ...By esoteric, are you talking about people like Madame Blavatsky, Alice Bailey, and The Tibetan DK? (Alan Oken's work?)
Vedic charts use Sidereal, but, their system is really separate and different from Western. (They have some vocabulary words in common.)
You already know about MTZ's Athens Chimenti, a Sidereal Astrologer. (Had left urls for you before, and you said you knew his work). The 13th Constellation is a 'hidden' house-spot in Sagittarius, so when you print those charts, it looks like only 12 Sections (houses).
Tell me what you mean by 'esoteric' ...?
There are shades of meanings for that word.
Esoteric (philosophic interpretation) of Solar Returns using Sidereal (not Vedic)? ...
I admit, you've got my brain boggled!
Seriously... You ought to contact MTZ's Athens, and ASK him about it. He seems like a pretty cool person. He may be very interested in developing that idea with and for you?
*hug*