Q. please advise me of data bases through Hollis, Hollis Classic or otherwise that target information on the sociology of Christianity.

You might begin with ATLA Religion Database to locate journal articles, essays, sermons, and book reviews in the field of religion. Citations cover all religions and all theological points of view. Fulltext is available for hundreds of titles.

ATLA Religion Database

http://nrs.harvard.edu/urn-3:hul.eresource:religind

For scholarship on topics in Greco-Roman antiquity, Année Philologique is good choice.

Année Philologique

http://nrs.harvard.edu/urn-3:hul.eresource:annphilo

For studies published in sociology journals, I recommend Sociological Abstracts.

Sociological Abstracts

http://nrs.harvard.edu/urn-3:hul.eresource:sociofil

I hope these recommendations help.  If your search results are disappointing, I would be happy to meet with you in person, learn more about your interests, and then help you to develop a more nuanced search strategy.