Ive found to make a good milkshake set of flavours first off find your milk base so then you can just add wich ever fruite you fancy but know that the cream is gunna be right each time, makes it much easyer. I use these in cream mixes personaly
Cap-custard v1
Cap-vanilla bean ice cream
Tpa-cake batter
Cap-grahams crust chease cake
Fa- fresh cream
Fa- vianna cream
Fa- malted milk
Fa- marshmellow
Fa- vanilla madagasca
Tpa-smooth
Sweetner of choice
They tend to work well together for creams may have missed a few off top of my head