I go through phases, with the sweeteners. Not mixing the dessert, pastry, fruit mixes, I didn’t have much ammo, in the sweetening department, when I started. I tried to think of flavors that I thought would compliment tobacco.
I started out with FA Caramel Candy, FA Maple Syrup, FA Toasted Marshmallow, FA Brown Sugar, and FA Black Honey Tobacco. Of those, I’ve used the Toasted Marshmallow & Black Honey a bit, recently. The Maple Syrup & Brown Sugar have always been hard for me to get the amounts right, for what I expect them to add, if that makes sense. That could be me though. I usually tread lightly with the sweet additives. I want to know it’s there, without standing out. Like you said, take the rough edges off.
I’ve had good luck with the FW Bavarian Cream too. I recently added FLV Sweet Coconut, FW Hazelnut, and Hangsen Australian Chocolate. I haven’t used them a lot, but I like what the Coconut & Hazelnut add. To me, they are ‘smooth’ flavors. I like what they add to tobaccos. The Australian Chocolate was a crap shoot, I didn’t have anything chocolate, and there were sooo many to choose from, I took a stab in the dark. I’m still fiddling with that one, looking for the right strength. It might not have one, for all I know, but I’ll keep trying.
I have two tobaccos, that I really don’t treat as tobaccos. I use them in light amounts, as sweeteners. INW Vanilla for Pipe, and the previously mentioned FW Black Honey. The vanilla and the honey in them are just too potent and take over, long before I get to anything that resembles tobacco. I do like them both, though, to add a little sweetness. The Black Honey is really strong. I keep that really low.
I don’t have any Cotton Candy, or EM in my stash. I guess I always gravitated towards sweet flavors, vs just sweet sweet. Maybe I should give them a try in the future.