How to balance resume between different sections

As someone who has also worked with resume professionals in the past, I will agree that they are mostly (almost always) a waste of time and money. Nobody really knows what gets the job. There can be studies with indicators, but you can't really "science" getting a job. Especially since, I took my resume and asked some of my very successful friends (people working at FAANG companies), and they disagreed almost categorically with every single thing I was told by a resume "professional". So don't listen to resume "professionals", don't listen to auto-builders (written by resume "professionals"), don't listen to AI tools or whatever.

Talk to hiring managers, if you're involved in recruiting (interviewing) then you can read applicants' resumes and get a feeling for what you like to see yourself. Chances are, if something annoys you when you read a resume, it probably annoys other people and you shouldn't do it in your own resume. If I could point to a few things which annoy me (not that this is advice of any particular weight, but this is my own anecdotal opinion/experience):

1. 2 pages is the limit. No applicant is important enough to read a book about. Well, I guess if your applicant is Barack Obama or Donald Trump, maybe you should read their books (which they've written), but short of that, don't read a book.

2. The most important things should be at the top. All lists should be in reverse-chronological order unless you have a very good reason for not doing so. Your most recent work experience is your most important because it's the most accessible reference to your current skills. Work history should be before education, should be above hobbies and minutiae, with exceptions (personally speaking I went to a very prestigious university for software engineering, so I have my education at the top to highlight it, and that tip was given to me by a couple successful friends from the same school, one of whom owns his own company and does a lot of hiring).

3. Unless you need to fill space, your description of each job should be no more than 5-6 lines, and should be point-form. If you write too much, it looks like you are trying to fill space and you have nothing really interesting to say. If you have many different projects, outline them all in point form; you will be asked for details in the interview if the interviewer is interested. Important things include a brief (3-4 words) description of each project, and if it had any quantitative results then outline those. Don't write an essay about each project, nobody cares (and if they do care then they will ask you in the interview).

4. Spelling/grammar errors. Here's a good summary of what not to do. If I see someone write "loose" on their resume and it doesn't refer to a rope, I'm instantly throwing that resume in the garbage.

That's about all I've got. There are no rules, and anyone who says there are is probably lying. There is advice and recommendations, but getting an interview is not science and shouldn't be treated as such.