With one or two more antimatters and less pandemoniums, this should at least be able to get to silver arena with average-good win chance... I would like to test it, but sadly i don't have any upped cards for it...
Antimatter is good creature control, Butterfly effect is good permanent control, and against bronze or silver you don't need much more. Your creatures have at least 4 defense so most creature control won't kill them too fast. With expensive Antimatter and Butterfly Effect, the quanta balance might be a bit off, but I can't argue about that without the cards to test it. You might want to add a discord, and a tower shield has synergy with Antimatter (since it doesn't reduce negative damage) and might be useful. I would even consider dusk mantle, but it might take too much time to play it with only the mark.
