O4S isn't that far off being as annoying as 24man content for lily generation tho =/
I'm instantly reminded of when we were first progressing on it, I wanted to use Benison for one of the early Aeros, but my Assize would come up a little before. Every time I habitually fired off my Assize as it popped, I'd have nothing to heal to get a lily back.
I quite like Benison as it is tbh, but the way it's poorly gated behind a system that doesn't really work well with optimised play just drags it down. Even something as simple as putting a bit of potency back on Fluid Aura and making that give a Lily would work wonders.