Zinfandel the White's page

Glad that I could help somebody today!

I think you could make a case that those spells could work against firearms, Zinfandel, but they're specifically for advanced tech, like laser rifles and null blades. I think you first need to answer the question whether flintlocks count as technological devices before you can call it one way or the other. Personally, I say no - those spells were designed to deal with super-science devices like death rays, not a metal slug propelled by black powder.

Fickle winds would definitely help, but the OP says the PCs have a way around wind wall, which suggests that fickle winds is probably also countered. If the OP could let us know what items they have available, we might be able to find a chink in their armor.

Antitech Field would help considerably, considering this text from the spell description: "High-tech missiles such as bullets and missiles immediately halt upon contacting the field, and either drop to the ground harmlessly or detonate."

Perhaps I'm over-simplifying, but wouldn't the spells Antitech Field, Protection From Technology, and Rebuke Technology significantly impair the gunslinger threat?

This seems appropriate here.

Zinfandel the White, master alchemist and vintner.