I was using IGI-4625. What is that mottle pillar blend? I like the pre-blended, have never added additives myself before. You said the Astorlite has a high melt point is that a negative? I've been pouring at about 175 with the IGI and they have come out fine. This candle waxing for fun and gifts sure requires a lot of information, thought, time, and money - but have to admit I love it.