I say it should be able to be transformed into other material, which includes what it previously was before it was turned into strange matter. This is Nyxmodding, as it has the same principles of what Nyx has, which is taking over stuff. And the black hole thing, uh, wouldn't the stuff inside the black hole turn into strange matter? Also, wouldn't that stop the process of the black hole, killing it? It should be used VERY RARELY for a drop of strange matter to make a hole planet become a blob. In fact, it would be god modding for it to be able to take over a titan, if it has shields on. For the NEMESIS, you didn't request the energy-absorbing tech, which is basically the EST. For the anti-matter, you got it wrong. A nuke releases only 1% of the energy. Anti-matter releases 100% of the energy, making it 100 times stronger than a nuke. This is just from an anti-matter atom and a matter atom. Thus, you need to use it sparingly.
Also, I know where you got the stuff about strange matter, but where did you get the info that if a drop reaches to a planet, it covers the planet?
Besides, I think this use of strange matter is Nyx modding.