I recommend a solo test for each first, and identify your sweetspot for individual pheromones. That way you will identify which of them is the sugar, the coffee, the creamer, the salt, and so on, so to speak. You’ll know then which to combine if you wanna have some coffee. 
But if you wanted to jump blindly into the combo testing, I think the recomendations in the store’s product page are your best starting point.
Check this out too –> NEWBIES READ HERE: The Ultimate Pheromone Introduction Pack
And don’t forget to create your journal.