Acne meds and facial masks?

I despise articles that go on about layering scrubs and masks and lotions. But I love them too.

They never address what to do if you use acne products!

I'm currently on doxycycline, with the topical medications acanya (benzoyl peroxide and clindamycin phosphate) and tretinoin.

I'm also going to be starting accutane soon.

I hardly ever use anything on my face aside from cerave but I love putting on those disposable paper masks during a bath, but I never got around to looking into what order I should use the mask (and occasional scrub).

Should I wash my face with cerave after a scrub? Use the cerave before or after the mask? It's very frustrating because I don't want things to interfere or cancel out the benefits of the products, especially the acne ones!

What about the activated charcoal craze going on? I have a very cheap mask and the charcoal soap from lush that I use occasionally (not often enough to see any possible results, but they're so fun to use to mix things up).

I'd love any advice or links to articles that explain how to incorporate acne treatments into beauty routines.