Samurai

Even though Samurai has been getting stacked heavily recently, that's not the main reason for this change. Samurai has proven itself to be a pretty average item in trading, as it has no real difficulty getting Stormrider apart from their small demand difference. It doesn't perform a whole level below it and can also get some pretty decent upgrades, like Orion M42 for 2x Samurais, mainly from stackers.