Wally Wood's famous "22 Panels That Always Work" is essential reading for aspiring comic artists, but also writers should see it and keep it in mind when scripting pages.
This one’s specific to comics, but: when your characters are having a conversation you can have them doing something else at the same time. Keep the visuals moving. It can be plot advancement, character stuff, doesn’t matter. Just have them doing SOMETHING.
In an idel world, the artist is skilled enough, is on the same wavelength as the writer, and they have a trusting enough working relationship, that an author can just hand them a page of dialog with minimal directions and trust them to rough it out.
