Dude, if you have a second amber nymph, for sure put it in the deck
It's basically an instant win against rainbow, particularly if you quint it. It's very strong against duos as well, though not so much with monodecks, but even there, it's good, and you have discords as well, which increases its power even more. Maybe fit another discord or two in, particularly as your mark is entropy you can reliably play it early.
I tried a deck kind of like this once with all my nymphs, but it didn't work out so well. I'm pretty surprised you can manage to compete against gold with it.