I'm now using perfumer's alcohol from Snowdrift with FOs in atomizers. I like its lighter feeling spray, especially in the summer. I've also used cyclomethicone and FOs in atomizers and it works well also. For roll-ons I use FCO and FOs. Each has their own particular feel that you may like better than the other. I really haven't noticed a lot of difference in the lasting power between them. I've not used many EOs because I don't do so well at blending them. It's on my list of things to do. HTH P.S. I've never added glycerin to mine, but then I've not used EOs.