No, you will get RFE for missing pages. Submit all pages for all evidence. Yes, it's expensive and bulky. My AOS packet was well over 300 pages.
Cover letter first (one per packet), followed by all forms on their own, followed by pool of evidence. No need to duplicate evidence for each form, no need to write cover letters for each form.
I'd include it to speed up processing. Your interview may get waived.