I tend to just stockpile them and not use them, because I want to have them "when I really need them", and then I never do. They seem mostly good for solo runs.
Exactly my (everyone's ?) problem with consumables in video games.
They're rare or costly enough that I don't want to use them all the time. But they're also not powerful enough, and I can easily finish the game with my spells and class abilities that are recharged every day for free.
