It might help you to visit the Flavor Apprentice website flavorapprentice.com
Here you find more detail/descriptions & sometimes reviews/recipes/percentages of the individual flavors.
I use cotton candy (or ethyl maltol) to reduce harshness & round out flavors (mostly tobaccos). Lorann & TFA are probably the same. I have the ethyl maltol from OneStop & just diluted it in PG.
TFA Sweetener is sucralose and I use it sometimes if I need more "sweet". Some people don't want to use sucralose, so they rely on the cotton candy or some use marshmallow flavor.
I think if you take a look at the Flavor Apprentice site, you might also gain some clues about your chocolate mix. I've never used the TFA chocolate, but from their description it's not really a stand alone flavor; rather a flavor more suited to blending with others.
Hope this helps you!