Bulk SEO on 15 Websites for 10 keywords each

I have 5 well established websites with traffic already coming in. I need to strengthen those keywords. I also have another 5 websites that are mini websites, which has some traffic coming in, but I want to start targeting competitive keywords now. And I have another 5 websites which are brand new and have little or no SEO done. So, 15 websites and 150 keyword strings in total. The kind of links I am looking for is: 1. Submissions to free directories 2. Submission in social bookmarking site 3. Link back from theme related sites Additional Points: 1. For established sites I will need link backs from themed lated pages that ALREADY HAS PRs! 2. Each site to be done over a period of few weeks/ months, NOT all at once! 3. No link backs from new websites, only established ones 4. Must be Google friendly, i.e. panda/ penguin proof. I am looking for a discounted rate since I am offering 15 websites. (Note: I'll be checking the link backs carefully before releasing payments.)