“A page from eczemaguide.com”:http://www.eczemaguide.com/eczema_treatments/topical/topical_corticosteroids.html claims that “early evening” is the best time to apply topical steroids, though provides no scientific reason why that’s the case.
There are a lot of pages that have a breakdown of corticosteroids by potency, but the group them into vague groups such as “mild” and “potent,” whereas most doctors carry around the chart that has the the actual 7-class potency breakdown. I was able to find “this pdf”:http://www.skinandaging.com/docs/DrugGuide1006.pdf that breaks down the common ones along the same 7 classes, as well as in another dimension related to their chemical structure.