TBS Uniqueness isn't too accurate, you should use the generate & compare feature of TBS with at least 30 copies in it to get an accurate reading.
And as suggested by saradanes, spin on both sentence and word/phrase level.
I'm doing this as we speak and have been doing it a lot in the past days, all of mine pass copyscape, are readable and would probably all get accepted on ezinearticles.
Hi,
Dont use the uniqueness counter it means nothing.
Instead go to publish > generate & compare and enter a number in, then in the table it produces you can see how unique each article is from each other.
Have a watch of http://www.blackhatworld.com/blackhat-seo/black-hat-seo/517769-how-spin-articles-properly-advanced-article-spinning-techniques.html for more detailed spinning information.