Let suppose i have one target page i.e video and one web2.0 blog or wordpress blog. If i keep on adding new articles on web2.0 and in each article i add one back link(with different anchor text) to my same target page. Is this create red flag in google as i will be using one domain?

Do I need to keep my web2.0 like bloggers.com and weebly or wordpress blogs relevant to one topic to increase the relevancy score. If i try to keep them relevant my back links to target pages from one domain increases again. I kind of stuck up in this loop help me out!