I am allergic to CO, it makes me itch like mad when used in soap! So I started using PKO for a sub, then recently starting using babassu oil for a sub for CO. My favorite bar is lard, tallow, rice bran or avocado, maybe some interchangeable light oils like apricot kernal, sunflower, or the like, babassu or PKO, and canola. I love the big bubbles that canola oil gives soap. I have never had problems with DOS. I find the simpler soap recipes work just as well for me as the complex ones, but I do see a difference if I use lard, avocado, rice bran, or babassu. I am a "mature" woman with dry skin.
For cooking, currently I use EVOO, and cold pressed Spectrum canola oil if I need a high smoke point oil. I have studied the nutrition research on lipids extensively, and I can tell you there is some evidence for and against any cooking oils. This is a very trendy subject. MUFA, PUFA, and saturated fat claims can all be supported or refuted, so don't be too sure about your stance on oils. Mine has changed many times. I will say that there is no definitive study showing that any particular type of fat contributes to disease or mortality. If you think you have one, please share it with me, because all the studies I have read that are definitive are BAD studies. I also use CO to fry fish, yes fry. My husband is a fisherman, and we love crappie fried in CO. We all need to be worrying about sugars much more than fats. And I hate saying that because I love sweets! In a more perfect world, I would be allowed to eat all the sweets I want without any weight gain or tooth decay!