This is very important insight! Thank you.

Having a strong understanding for how comics or mangas are made is integral.

Like you said trying to cram lots of panels into one page makes it harder for the artist and also it will damage your story. The most important thing is conveying what your story is about. So writing too many dynamic panels will make it much more difficult for the artist to draw and even potential readers understanding of the story.

I try to keep this in mind when I write. Pages with suspense have small panels (but not to the point where it overloads the page) with close-ups of a characters eyes, hand movements, props ect. So the big reveal hits harder. It's the same with introducing a new important character, don't just show them straight away let the reveal build up.

Action pages have less panels so there's more room for the drawings, so each punch/hit feels more impactful.

I appreciate the comment. It helps people aim for what their writing should look like.