I love the Sea Witch, but it needs a little extra TLC, just soap cool, and don't water discount too much. I was able to do a two color tiger stripe, but next time I will probably just do a drop swirl. The scent is holding really well, and smells the same as the day I soaped it. Don't know if you use lard, but this FO will be much slower to trace with a recipe that has lard included.
Sex Bomb was easy to soap, had plenty of time to use four colors, didn't notice any discoloration. For me this scent held very well at 1% FO per pound of oils used.
Karma was a very well behaved FO, no discoloration, or acceleration. The Witches Brew has a very low usage amount, so check that before you soap, you may end up blending it with another FO that has a higher usage amount.