For Foundations, since we are building out a good volume of links, we want to keep the anchor text to a very natural ratio.
We include terms like the URL, domain name, and benign anchor text (i.e. click here, learn more) to ensure that our progress looks organic to Google. Those more precise keywords we want to aim for will be in the Foundations mix (about 2-3 per Foundations order) as well as the Guest Posts.
Here is a great resource if you'd like some more information on this.