Fire Blast
I'm less scared of studying fear than I am of seeing what adding Spore, Shell Smash, and V-Create to a Pokémon's move list will do. Honestly, what move would you put over those three? Maybe Blue Flare or something, depending on the stat spread. Even if we nerf every other aspect of the CAP, Spore will make it viable in any metagame we drop it into. It's a crutch that I don't feel like relying on.
Hail doesn't particularly inspire any comment from me, and a "psychological warfare" griefing CAP feels like a watered-down version of the fear-inspiring CAP we'd achieve via Fire Blast's concept. A panicked opponent plays worse than an annoyed opponent, in my experience.