High PR Blog Commenting to Money Site - How many unique domains necessary to link from?

I've just scraped a load of High PR, targeted blogs to comment on.

Out of my first 100, they go from PR6- PR3 and they have very low OBL - these blog posts are GREAT

..however there are only 10 unique domains.. all blog posts are on pages like:
http://w ww.mynicheblog.com/niche/blog_post_on_niche but there are only 10 actual root domains - I'm NOT talking about sites like wordpress.com, these are all privately hosted niche blogs on their own domains

Anyway my new backlink campaign calls for 10 high pr blog comments to the money site each day..

Would it be unwise to use this list of 100 blog posts to comment on if they only span 10 unique domains?

For the first 10 days this would mean comment backlinks only come from the same 10 root domains.
I'm thinking I might try and get it so that my list has something more like 40 root domains per 100 blog post comments

Obviously it's okay to post twice on the same website if it's on a different blog post but what is the limit? What kind of ratios have you guys found that worked?

I want to know the best root-domain:blog-post ratio for these kind of High PR blog comment backlinks..

Should be very interesting.. excited to hear what you guys think!