I don't really think limited access is a balancing factor. I've always found that "rarity" makes imbalances worse because all it really does is make them much harder to correct, not any less imbalanced.
Comparing it with Hellfire, which has a higher Faith requirement, one fifth the range, and does 13 damage to a single target... I'm not sure. The description on Breathe Fire seems to suggest that it will always
include the caster and allies next to them unless you get that Outstanding Success, and that does make sense because it is, after all, coming from their *mouth*. That
would sure balance it out nicely! You wouldn't want to use it unless you were ready to really boost that roll, and bad rolls could still easily leave you patting out flames on your suit.
But the 25 range and Medium Blast don't really match up that way - Medium Blast means it will affect you if you happen to be next to your target
, and likewise with any allies, but if you're targeting a group 20 meters away, it's not going to hurt you ever. So that just means, OK, it's a ranged attack. It's certainly not the only one. Fireball doesn't even give you the hope
of being selective about it.
Given its theme, it should really probably be "Medium Blast, range Touch," so that it always
starts adjacent to the caster (again - coming from their mouth) and will affect them and anybody next to them, friend or foe, unless they get the control over it with an Outstanding Success.
...though that would set a risky precedent for my math ninja, so maybe it's better that it doesn't work that way.