Accelerant to turn a weak smoldering fire into a torch. Big hydrocarbon like paint thinner or car parts washing petrol.
Even in the boat, back with the fuel tanks, Dad always had a bottle of "Varsol," shop cleaner to start fires no matter how wet the wood was.
Big red highway emergency flares burn hotter than Hades for exactly 10 minutes. I can start any fire with one of those.
Break open a few rifle shells = there's your dry powder exactly when you need it. Modern powders are not explosives but they do give a steady burn.
If you pump it up good and hard, the petrol tank out of a Coleman 2-burner "green box" will provide all the encouragement that your fire might need.
I have a screw-top aluminum can, maybe 6" tall x 4" wide. Rides in my day pack, go nowhere outside the village without it. Besides a roll of magnesium wire, there's boxes of hurricane matches, a wire saw and other incendiaries. Some birch bark and a mag block with a ferro striker on one edge.
Just about all of my life, I have been close to the great Boreal Forest of various conifers. The driest twigs are always closest to the main trunk and always very resinous. Bash them to fiber between 2 rocks. Lay the fire with wood up to 1" if we could. Any spark source should catch in the twig tinder fuzz.
Funny, it's such a habit that I forget that I have the can-of-fire in my pack. I have practiced with the Mag block, ferro sparks and birch bark shreds. Flames in 30 seconds.