MC is very good for soy, especially their heavier Christmasy scents. I have also had success with WYW oils, but they are spendy for testing. I don't think there's been even one WYW oil that hasn't thrown like nuts in my soy. I get them through BCN. At what temperature are you adding your FO to your wax? Also, depending on where you live, going over 3% b/w may cause cracks in your candles, and you'll want to lower the b/w amount in the winter. It actually makes the soy much harder, so it's a more attractive animal, LOL! I usually use 6% of any of the FOs, there are a few exceptions, but not many. I'm not a fanatic about it, but I do like to stick to 6%, and most of them work great, with very strong throw. You may think about trying some tried and true FOs like Spiced Cranberry from MC or BCN, and see what you think at 6%.