I've been trying to rank for certain longtail keywords for more than two months but only get to the bottom of page one and top of page two. Steps I've took was linking from my PBN sites, blog commenting and some Web 2.0's. I've checked the top 5 sites through MOZ and Adher's but don't see any backlinks from PBN sites. It shows 0 root domains and 0 established links. Even my DA, PA, Root Domain links, and Total Established Links is much better then my competitors. My competitors even have some spam score while mine shows nothing. So what am I suppose to do? Any advice would be helpful.