Hey Marta,
I'd certanly agree with the general idea of your strategy, but best practices really vary by industry and company. Plus, the type of content that resonates best really depends on the segment you're targeting. If you're hitting very early stage leads, the educational, content-focused pieces are probably going to be effective, but for a late stage lead, a personalized email from a sales rep with a case study could be more appropriate.
Just a thought!
-Jeff