Formulating a Plan ....

What's you're rationale for the variation in length? Just curious. I don't count words, I just say what I have to say... and TRY to remember to run it through spell check and read it aloud before posting it to hear any gross errors in grammar, syntax, etc.

Graphics work extremely well with some audiences and not so much with others. The happy medium I've found is to not have anything critical to the blog/article in the graphics; strictly as a compliment or adjunct to it.

Videos clearly are the fad du jour, so adding more of them than you might otherwise think is necessary is definitely the way to go! There's nothing wrong with just reading you blog/article or ad libbing it. (Some of the college kids are doing exactly the reverse sequence - they're recording the video first, then running it through Naturally Speaking to get the transcript. The only caveat here is you have to use the premium edition of NS for that AFAIK.)

All this, of course, has to be relevant to your keywords. I do not get worked into a lather about SEO because I'm not convinced any of these schemes to game Google are really worth the time, effort, or money. Of course the promoters have a vested interest in the contrary, but...

The crucial part seems to be missing: what are you going to do about list building and your sales funnel?

FWIW I spend less than two hours a week on writing the blogs/articles. The bulk of the time, I'm working on product development, sales copy, and the initial e-mail campaign related to that project. Even if you're going with services or affiliate products, you have to work on copy and the e-mails - which will easily match your time spent on content.

If your top competitors aren't releasing quality content as fast you will have an edge.