Thanks for spending the time writing this.

There's a lot of products here! I think many of them can be replaced by a single 20-30% urea moisturizer, as detailed in our wiki's guide to descaling.

Urea is a more effective keratolytic than salicylic acid, and causes psoriasis plaques to break down and slough off naturally. It's cheap, available over the counter, and there are many creams available that aren't too greasy. Other moisturizers like shea butter need a heavy amount of fat (in the form of oils, petrolatum, paraffin wax, etc.) in order to soften the skin, but urea doesn't.

Eucerin, a very good brand, has several products with urea. Eucerin Roughness Relief is 30% (despite not showing the percentage on the bottle), and Eucerin Intensive Lotion is 10% (safe to use on the face). Eucerin's products are not the lightest, however. I also like PurSources (20% or 40%) myself, although the menthol scent isn't great.