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So our site is database powered and used to have up to 50K pages in google index 3 years ago. After re-design that number was brought down to about 12K currently. Legacy URLs that are now generating 404 have mostly been redirected to appropriate pages (some 13K 301 redirects currently). Trafficked content accounts for about 2K URLs in the end so my question is should I in context of concentrating link juice to most valuable pages: remove non-important / least trafficked pages from site and just have them show 404 no-index non-important / least trafficked pages from site but still have them visible 1 or 2 above plus remove from index via Webmaster Tools none of the above but rather something else? Thanks for any insights/advice!