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I have exactly zero of them and I don't plan on crafting any yet. But I've encountered such players many times and had mixed success battling them.
Right now, my priority is to finish building my sword deck. I need to gather about 3-5 more gems. Then, I want to upgrade my omen portal; I really want to play with it. Overall, I've managed to assemble more or less decent decks for each class in the rotation. I won't even mention unlimited; I already had everything great there, and now it's even better – I tried playing with the mouse, and on average, it generates twice as many pings by its turn compared to the rotation.