I am responding with what I know of essential oils, their properties are very different than their synthetic counterparts. Sometimes the flash point is extremely low. I know with my litsea cubeba and my citrus that I use in my soap making has a much lower vaporization point than my fragrance oils. My concern would be the concentration of essential oil in some of the blends. If it has a lower vaporization point it should in turn affect throw. My wax I use is ecosoya cb135 from Candle Science. I'm pleased with the wax, the service, pricing and my relationship with my supplier. Thanks for posting this thread because I'm still new to candlemaking and I have the utmost respect for all of you that do this, and do it well. Making Cp soap is a cakewalk for me compared to my candle research.