Personally for the butter champ I would get something with black pastel and fire. For the super fire I think I'd pick something with enchi, yellow belly and mojave. There's honestly so many options.
I would get a mojave for the butter champagne to have a chance at butter/mojave blue-eyed leucistics. And a fire for the super fire to get a split between fires and super fires. Otherwise, try anything that you think might look good. Have fun.
I'd breed the Butter Champagne to either a Pewter female or a Pastel Enchi female. The Super Fire I'd definitely pair with either a Pastel Disco or Pastel Vanilla female... or maybe a Enchi Yellowbelly? So many ideas with that one