Use AMR to post in THREE stages
1) Ezine and Ezine alone. This point to your main URL and one inner URL
Use Myrss feds or similar to make a feed then send it to 100+ sites
3) Spin the rest of the articles, add two links to each, one to your site and one to the ezine article (not to the other pr4+ articles). Don't ping these, some will stick others won't. There will be 600+ so it's no big deal. They will be found over time (well some of them)
Post to ezine first - get that version indexed.
Why? Because if the content is flagged as duplicate at some point you don't want the version on "crappyarticles.net" to be counted as the original..you want the version on Ezine (or maybe How or Alley...but a good article site) to be treated as the first and best.
I never spam ezine. No point. Multiple similar links from the same base URL (site) seem to count for increasingly less the more you post.