If you need a fast way to increase your rank then these web 2.0 is your answer. Just remember it's not about quantity but it's about Quality! Put your url into a quality blog makes it more worth to google.
And for tier 2, I will share all 5 posts to social media and social bookmark to boost your backlink.
Please prepare your 5 unique articles (spun ok as long as it pass copyscape.com) before you order. 1 keywords and 1 link allowed.