Lol! I made a 10mL batch. Whatever your base amount are you use, I did a 10% flavor with the first try and then added some drops additional so the flavor is probably between 12-15% now. I did
4% blackberry (TFA)
4% vanilla custard 2 (Capella)
2% graham cracker-cheesecake (TFA)
After trying it I added 4 drops of a regular Cream, and 4 drops more of the vanilla custard. I had no goal in mind for this one tasting like any particular thing (like a cobbler for example) so I am pleased with the flavor at the moment. After it sat for a night it already mellowed out a bit. I will finish the little tank I filled and let the rest of the batch sit a few days longer and let you know if it's better/worse etc.