Point 1: Perhaps, but that may also be because of the arena bonuses that exacerbate the inbalance.
Point 2: Perhaps, but it could just be many decks in arena counter purify, creating a RPS in arena (Pure rush loses to SoSa, but putting in some purify lets me win vs SoSa)
Point 3: SoFo is OP.
Point 4:
This is a viable deck, but by no means that great. It's much slower than other rushes and has no PC whatsoever.
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This is a 24/6 deck and "half decent" as well. Does that make ruby dragon OP?
inb4 someone says this is a joke and I'm taking things too seriously