Actually, I would prefer to go the other way. Sounds like you could run the risk of putting all your eggs in one basket - e.g. if all your fire-starting material is in one mini-kit and you lose that mini-kit, you're hooped. Whereas if you have lifeboat matches in one mini-kit, a mag-flint in another, and a Fresnel lens in a third, you could lose two out of three (e.g. in a boat capsize) and still have a better than decent chance of starting a fire. To a certain extent, this could end up requiring you to carry more material - e.g. 2 fish hooks aren't much good without fishing line, so if you split your fishing kit among three mini-kits, you'd more or less have to have three lengths of fishing line; but I'd still aim for diversity rather than specialisation.

Just my humble $.02 worth <img src="images/graemlins/smile.gif" alt="" />