Fire-n-Fluff

New to this whole craft and trying to get a hang of it. I've been working with IGI 4625 to create novelty shaped pillar candles that are molded in silicone molds. My only issue is creating a very opaque candle, since I cannot seem to achieve it with the IGI 4625. My fiance picked up some ArtMinds pillar wax from Michael's to test before we bought a large quantity of wax, and I absolutely love the opaque surface it creates; but I know it's more expensive and inferior. I don't really want to run this whole project on craft store wax that I can only buy in a few-pound quantities! Even when I use the same dye color (pardon I didn't for the photo, just had test candles), I still have that difference in opacity - it's visible in the wax as well. As I understand it, Vybar 103 may help with opacity, but IGI 4625 already has Vybar added and I hesitate to throw more in. Am I better starting off with a 140melt paraffin and adding my own Vybar? I've heard a couple things about luster crystals, although I cannot find much information on them - and there seems to be conflicting information if they make things more opaque or more transparent. Thanks for your help!