Hi there! I had former professors that I knew would speak to my research interests write my recommendations. Though I'm not certain, I feel that GREs, GPAs, as well as experience are all equally weighed during the decision process. I was strong in some areas and only above-average in others, and they seemed to take all into consideration.
I had a total of about nine years of experience before applying to the Ed.D. (6 years as a nuclear engineer, 2 as a classroom teacher, and 1 in research), though I'm a bit of a non-traditional student as I was enlisted in the Navy for many years before finishing my undergraduate degree.
Overall, I would recommend focusing your statement of purpose on clear research interests and goals while also showing that you want to continue to grow and contribute to the HGSE learning community. Be clear about why you are passionate about understanding and contributing to the body of research in your field. If you have a strong background in research, talk about that, and if you don't, use your past experiences as a framework for future research agendas.
Good luck!