I haven't actually made any yet, but if I'm reading the blueprint right, you get 1 rocket from the ingredients. If that's true, nobody is going to spend 3 napalms to make one rocket, especially since Kevin sells four each restock. From what I could tell while briefly testing them, they seem to create the same fire as a napalm molotov. I would suggest 1 napalm or 3 magnesiums (real Flash rockets didnt even use napalm, they used a different substance that burned much hotter), or perhaps a napalm and 1-3 hexogens or some other combination of these ingredients. 2 napalms at most, and even then I doubt most people would craft them.
