I was planning on making a face cream and was wanting to use both the carrot carrier oil and carrot EO. Is using both of these oils considered over kill? or is it best to use one over the other. I'm looking to make a cream that would be great for keeping the skin young and believe these and a few other oils will be in my choice selection. Also for face cream, would it be better to start with a water % of 75% or greater?