On paper, not a healer I would readily pick and play tarot card interest be damned.

Its an interesting concept, but something I would need to play.

If we're going with the idea of compiled damage, why have it be this complicated though, and why tied to Noct sect? Why not have it be a couple of skills? Horoscope, ES, and Macrocosmos have proven that we can place a buff (and then in theory debuff) that can detonate later, we can just design dps skills for AST to have that do something similar.

Could even tie it to cards. For example a RR like situation where you place the debuff dps skill use X card and then when it detonates you get the buff applied to the party (or if we want a Reverse applied onto the boss/mobs) that you can line up for an attack or burst phase if you time it correctly.