One of my sites is purely based on long tail keywords. I had quite a bit of success last year by using sources like ALN and other high PR blog posts (similar to BMR). But as we all know, these networks have been de-indexed quite a bit and i've seen my positions drop. Right now I am seeing many websites in the Top few spots with 0 backlinks, but strong domain authority.
What is the best way to work on these long tail keywords now? I realize I could do many things but for me i'm also trying to keep the budget low for these. Is UAW still effective? Are high PR blog comments still effective?