Something I realized is that arena farming may have lost Fire Stall, but I think it gained something potentially just as bad. The fact that SoSa is going to become a crux in the arena metagame. The simple fact is that SoSa can be played enough in an arena deck to literally deck you out before you can hurt them if you have a 30 card deck. 12 SoSa, 2 turns each, 24 turns of invulnerability. Which means you
A: Play an OTK deck. Good luck doing this on a 150+ opponent with the quanta cap, or even worse if they use SoD with light mark to pump their max up even higher.
B: Play a Stall deck. Not good farm-effectively at all. But might work as long as you account for the in-element poison possibility, SoV's are probably too slow to work against the deck so you're better off going for deckout, which the Fire Shard could help with if it really forces opponents to draw.
Point being, its rare now, but I know arena decks, and balance shouldn't be based on them but I foresee SoSa while balanced PvP being a dominating force in the Arena metagame.
Also, I've done about two dozen spins, and only won 2, a SoV and a SoSa. I'm not sure I'll ever get them at this rate.