Osmanthus can be paired with any tea, and there is no such thing as which teas go best with which.
Osmanthus belongs to the flower tea, osmanthus has a soft aroma and delicious flavor, you can add it appropriately when making pastries, you can also make water to drink. Osmanthus can be brewed with other floral teas, such as jasmine, rose, chrysanthemum, etc., but also with green tea, black tea, oolong tea, etc., can help the body intake of water.
There is no clinical finding that cinnamon induces discomfort when paired with which teas, and there is no finding that cinnamon is better with which teas, so you can pair cinnamon with any tea.
Some people may be allergic to pollen, if you are allergic to pollen, you should stay away from cinnamon, not recommended to drink cinnamon water, so as not to cause allergic symptoms in the body.