I like that idea, Captain.
We can sort of circumvent the palette issue with those sprites by having them as PNGs, though that might still look a bit gaudy in software. An alternative is to bump the contrast up and use a more saturated Doom palette, like this:
ultrakits.png [ 1.04 KiB | Viewed 1690 times ]
(The top sprites conform to the hell_x.wad palette, the bottom ones use the same colors but conform to the ordinary Doom palette.)
I'm still in favor of using my original sprites for the megakits/stims. Partly because I'm best at recolors and nothing much more.