Sometimes we want to work within a particular culture for ritual. This may be because we're interested in exploring a new culture, or because it is the same culture our patron deity is from. In any of these cases you can choose a Being of the Occasion from a particular pantheon that fits the theme of your rite

Sometimes we're doing ritual for a specific task, and we need to call on spirits with skills that align to those needs. For instance, if you were doing a ritual for healing work, you would likely choose a Being of the Occasion who has healing skills.

Perhaps most often we are doing rites to celebrate a particular season or rites of passage. In these cases it makes the most sense to choose a spirit that exemplifies the work you are doing. This may be a harvest deity for a harvest festival, or a deity of marriage for a wedding.