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The rel next prev is not for duplicated content - it just shows google how the parts relate to the whole. An alternative to the rel next prev is the "Classic Pagination for SEO" that uses noindex another article by Adam http://searchengineland.com/the-latest-greatest-on-seo-pagination-114284 If you have a duplicate issue, this would solve it as you would noindex all the duplicate pages. What you need to do (and I can't do this for you), is to look at all the crawl paths that you are providing Google.  As I mention above, you are not doing any favors to Google or to your site when you show Google an infinite number of paths to get to the same content.  It just wastes Google's time and you don't want to do that when Google also has to crawl the rest of the internet.   If you solve this issue, you will solve your duplicate issue. AJ Kohn just posted an article on the concept of crawl budget that talks about this.  I think the article is quite good and it explains why we need to look at all the topics of noindex, nofollow, robots, canonical and rel next prev  http://www.blindfiveyearold.com/crawl-optimization