The only way to get the game done quick is if you focus on the position of toppings, cooking time and cutting. If you get high in all 3, itll compensate for the very low waiting time of the customer.
Amaya looks weak, but is one of the best starters ever. Only fails against Ashi and Popo. Just Ninja-port then Intercept twice and you have a 3-2 advantage at the start of the game.