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Perhaps my question is to difficult without showing the Url. I don't want to post it here, but I think it will be helpful to refine my question that you can answer it on a general level. Can you give me some best practice tips how to optimize strong subpages which are still ranking on top 3-4 if you consider, that these pages already have 50-60 incoming links from different sources and exact anchors / anchor variations which is much more than the pages from competitors. Is it too much at some time for one single subpage? Or should I keep going with optimization for this keyphrase until I'm on top 1-2 or in the filter? What is best practise to avoid those filters?