I would go with the Pied male. You'll get an entire clutch of Pieds. If you breed a het male to a Pied and a het, there is still a chance that you could get zero Pieds from the breedings. I would go for the guarantee and breed a Pied x Pied. Also, if you did het x Pied and het x het...you may still end up with the same amount of Pieds or less.