Group dozens of related markets into a basket (say, every 2027 gubernatorial race) and trade the basket against its expected aggregate outcome rather than betting on any single race. The edge: individually the markets are noisy, but in aggregate their combined probability should hit a stable number, so when the basket's total drifts away from your model you trade the whole group back toward it.
Markets on Polymarket where statistical arbitrage across baskets is the natural play: