I have the WF Bavarian Cream but haven't had a chance to use it much yet. I almost added the WF Vanilla Custard to my last order but went with INW Custard instead for a particular recipe I want to mix. I've seen you mention the Orange Tart and the LMN# quite a bit so I knew you really liked them.
If you like orange flavors, there is a recipe I want to mix called Tiger Stripe by SirMixAlot on ELR. I was watching a recent episode of Noted on YT and they were raving about it. I think I will get the flavors for it whenever I make my next order.
I don't have the WF marshmallow or the WF vanilla ice cream. I wouldn't be afraid to sub the marshmallow for FA but haven't tried the ice cream but would think another would work. I don't get using the salmiak. Black licorice doesn't seem like it belongs in the same recipe. Kind of strange. Who knows, it might be good.