When I started with that wax a short time ago, I started with zinc, then HTP wicks and wasn't happy with the burn at all. Then I got some of the ECO wicks, like Candlescience recommended as their first choice. I did some last week in my 5 oz jars using an ECO2, and they burned great. For the 9 oz jar, they recommend the ECO8, so I will be trying that soon. But I have RRD's yet to test as well. You are just going to have to start playing and see what works. On the jars I used HTP & Zinc wicks with, I just burn them all the way down, helping them along the way (by using my handy-dandy butter knife to gently push the wax down). Then I re-use the jars as testers. I don't really sell, but if I did, I wouldn't sell one of those. I've read that the stability of the jar can be compromised after many burns, so that worries me. Anyway, hope this helps some. By the way, I started with a votive kit a year ago, then branched out to try jars. I found votives to be relatively easy to make. Got my kit from Cajun. I still make more votives than anything. Valerie