How do Fizz and Eager Apprentice interact with Bellows Breath Repeat cost?

Repeat is an additional cost and does not count for Eager Apprentice's base-cost reduction. Fizz's effect is a base cost modification applied first, so you ignore base Energy costs. Then Repeat is added, making the spell 1 Energy 2 Power. Eager Apprentice's discount has a minimum of 1 Energy, so nothing changes in this case.