Blueridgebev, I love those light batiks. It's hard to say how different they need to be. The two lights I'm considering are also very similar; they both read as solid, one is cream and the other is a little whiter. I just didn't have any very light tone on tone with color, but she does say A can be tone-on-tone, solid or a subtle print. I didn't think I had any light prints that were subtle enough.
Do you have more than one blue in the photo? Were you thinking of the gold as your first dark and the green/gold as your second, or was the gold your light? It shouldn't be a problem to use the green/gold as your E, there weren't any specifics given for that. It seemed to me -- whether intentional or not -- that her A and B fabrics coordinated with each other but her D didn't coordinate with A and B.