[Darkwind]

1. Well, their attacks won't be completely fire-based. A gun shooting bullets of +3 OH GOD I'M ON FIRE might have the "OH GOD I'M ON FIRE" part negated by those, but not the "gun shooting bullets" part. Of course, a gun that could be held by sentient flaming gas would be hard to find.

So yeah they're pretty much screwed. I've been planning to give them a Bane Fire-esque national spell which requires a bit of Astral (and a lot of research), with the effect of "OH GOD I'M ON FIRE" without the resistances the "FIRE" part would imply. And if they turn out to really fail, I'll give them a Blood spell that's essentially a nuclear warhead detonating over your skull, but with more "fiery death" and less "I have three arms now haha". Maybe even a low-Blood spell to summon "Lowblood"s who are basically Humanbred Abysians (ie, something that can wield Resistsfireium without melting it). I plan on giving them a fairly powerful Blood multihero, and maybe a mage that can break the Blood barrier (the same mage that can get astral?, by the way. Basically you can't go wrong with variants of "OH GOD I'M ON FIRE".

2. Wow you're right. I just checked Jomon, and those guys seem fairly cheap resource-wise, although that's a somewhat hefty gold cost. They'd be incredibly effective against Piria. Perhaps a capital-only unit with a Banefire-esque (minus the Decay of course) attack that checks MR instead of fire resistance? It could help solve the problem of the troops completely failing against Fire-resistant nations (they'd only mostly fail).

3. D'oh! Immunity to fire is kind of obvious. I might even give the Truebloods and higher, or all of them, some resistance to cold. They are sentient flaming gas, an iceball isn't going to touch them. Immunity, or resistance to, poison would probably be a good idea too. Maybe even darkvision or blind (they're fire incarnate, a little darkness won't do much, if they use eyes at all).

4. Fireball is AoE armor piercing, right? That's probably what I'll give my units. Giving commanders absolutely no items sounds a bit harsh, though. I'll probably give them misc slots, so they'll remain at least somewhat thuggable (or in Firstbloods' case, SCable).

5. Wow this post ballooned quickly.