I see Quick Hit as the recommended method of dealing with basically everything late game in Final Fantasy X.
Why isn't Doublecast ever recommended for dealing with anything late game?
Doublecast is Rank 3 and Quick Hit is Rank 2 (on the remastered versions of Final Fantasy X.)
This means that you can get in 3 spells to every 2 attacks. Presumably every attack does 99,999 damage late game, so it seems like Doublecast would be better.