As Georgia says, with square braid I'd start with a 1/0 or 1. With flat ply I'd start with a 30. However, I find that I sometimes get excellent burns the first time and then on a marathon burn they can conk out, so be sure to do one long burn. As I said before, I'm finding that HTP wicks are working better for me with heavy or strong fragrances. Haven't tried Performa, but the local supplier keeps bugging me to.