haven't seen much research in that area. The only paper i've found that listed any is that Psychedelics & the Human Receptorome which has some useful information, but also some methodological issues, so some of the info may not be all that accurate.
EDIT: The PlusOne site seems to be having some issues so i just linked to a table with some of the pertinent data. There's also a good thread on this paper over in ADD
Are the IC values the correct measure for revealing efficacy? Given that the DOx series is closer to full agonists at 5ht2a and highly effective psychedelics, a highly effective inhibitor would unlikelky be a good psychedelic.