Aero 2 used to be 18s duration, right? And then on top of Aero 3 which had a different duration, you were regularly keeping them up in addition to Stone 3, making different buttons and DPS contribution much more varied than even from SCH and AST. Cleric Stance on top of that made it even more fun, IMO, though I know a lot of people didn't like it. SCH had what, 3 dots plus Shadow Flare and Energy Drains? AST was the most "standard," but needed to be because they were using an actual fun card system that had soul which gave them varied buttons.