Don't worry too much about nymphs. We can make 1 or at most 2 decks using them. I suggest only using the green one since 3 people have it. Maybe amber one if we come up with a good deck with it. But like said, we better not focus on nymphs right now. As i predicted they will probably come up with stall decks, so we should take this into consideration while building decks. But that doesn't mean they all will try to stall us, so this shouldn't be our primary focus as well. I'll try to make a few more decks and suggest them to your judgement.
