Set spells so that if your level is say, maybe 15?, 18?, 20? levels about the level you get the spell, failures are no longer possible. Still allow fizzles from metal, just no failures. Being in the mid thirties and having vigors not max and fail enough to be noticed seems goofy for a fourth level spell.
I am not saying they should all max out, just not fail.
I am not saying they should all max out, just not fail.

