So I am trying to flesh out my world's religion now that I have a priestess (a "Lorn" in the parlance of this society) and her apprentice as characters. I have settled on making it monothestic, but also working to make it somewhat different from Western monotheism in our world. There are some elements clearly with Jewish or Christian roots, but there is no "Bible" or salvation in their beliefs (maybe there will be a sect like that later, but so far not). Really, it is more like a pagan tradition that has evolved into a kind of monotheism or henotheism (multiple deities but one is supreme above the others). So far I have:
Denith - "God"
Denith An - "Angels" or maybe lesser deities, basically spirit priest(esse)s
Denith Lorn - the human priesthood
Denith Sha - lay order who provide protection and other aid to the Denith Lorn
Tan Denatha - the Denith Lorn "Vatican", basically a huge palace complex where the leaders of the religion live and work
Colleges - sects within the Denith Lorn focused on particular things (e.g. Elera in my latest story is from the College of Spirits, which studies spirits, sorcery, etc.)