im ordering off someone who makes custom blends for customers. they have tons of flavours I just don't know what flavours match well together
Most all fruits can be mixed with some Vanilla & some Sweet Cream.
Vanilla Custard, Vanilla Bean Ice Cream, Cheesecake, also go well with fruits.
Apple with some Cinnamon is another.
Some like Strawberry & Banana together.
Literally hundreds of possible combinations are possible.
Figuring out how much to use is another story, especially not knowing what brands they are.
You're better off ordering the more popular brands online, like FA, TFA, CAP, FW, FE, INW, etc.
Unless you can find out what specific brand/s they use, or maybe can order for you?
Having tons of flavors doesn't mean much if they use sub-par brands, which isn't really likely tho.