I personally do not use synthetic oils or scents I get many from my sacred garden and others from a Herb Company if I cannot grow it. I also take trips into California and go to San Francisco to China Town and by some dehydrated herbs there also.
I combine certain assential oils to make a blessed combinations to use in castings banishings and love making you name it any kind of magick work.
If I had to pick one scent I guess it would be neroli..