Any slight hint of AI prose could mean a direct No from me, let me explain why.
Our process is fair IMO:
1. one CV (if you apply to jobs you should have that one already)
2. a cover letter that shows that you know how to map your CV to our org and the free position. That cover letter could be text in the email you sent the CV in
3. (if invited) an 30 to 45 minute interview with a roughly 1:10 chance of getting in.
If you think you need to game that fair of a process you are the wrong hire anyways. That means the approx ten people who get invited are invited based on their (vetted!) CV and on their cover letter. That means your cover letter is read by a human who will judge your text.
I am not a fan of artificially driving up the effort canidates need to make when applying. I just want to know they informed themselves about my org and gave a few thoughts about the position they applied for (what job it is, why they like it, why they would do a good job etc.) - thst should not be a high bar to clear, but over 80% of candidates struggle even with answering that.