I think we may be missing the big picture. It might be effective to create the most effective decks we can from other elements and PVP Duel using them against ours, we don't have much time.
Do we know who our first opponent is? I would be all over this once we do. I suppose we could even do the trickiest decks (Entropy overall comes to mind, but elements that can effectively heal or have speed are tricky too... Life, Earth, maybe Darkness).
Anyone that sees me in chat is welcome to PM me and we can organize some PVP Dueling.
Hopefully we can get some flexibility in our decks. It's hard to believe most Entropy deck's won't include Discord when so many decks they will be facing will be Duos, so we would want Rainbows against them, ideally. And elements with shields that can really stop us in our tracks, like Aether, Air, Darkness, Water, we'll want to spread around our Deflags. Luckily it doesn't make sense to bring like 5 shields into a battle, so hopefully Deflagging will be effective.
I am worried about a Discord/Black Hole combo from either Entropy or Gravity. No reason they couldn't use, like, 3 or 4 of those. I would say that rushes would be good, but a Maxwel's Demon would stop that cold.