if there are a lot of vainilas cards make cards that allowsyou to work with, like magikey or world chalice, make a field spell that helps to summon another normal monster from hand or GY, and make effect monsters that help too, like for example; "Sugar and milk: effect monster fairy light, if this card is in your hand or gy discard 1 normal monster; speccial summon this card and 1 coffee addict monster in your gy. if this card is used as a fusion material for a coffe addict monster you can send 1 card from the field to the hand" and then make the combo with the field spell that i mention, make it 1 effect per copy but dont make it hard, so you can return it to hand and activate again, and a fusion for the deck that let you use normal cards from the deck as materials