One application of "Dark Energy" manipulation is that it can completely negate energy manipulation. in fact, any energy type attack would strengthen Dark Energy manipulation type attacks. Dark energy causes regular energy to get stretched as it's causing space to expand therefore weakening its affects while strengthening Dark Energy affects since its causing a negative work which is needed to make more dark energy. As regular energy is stretched it creates negative work which negative work creates more dark energy.
"Work, in physics, is when you apply a force to an object in the same direction as the distance it moves; this adds energy to the system. If the direction is opposite, you do negative work; this subtracts energy from the system. A good analogy is to think of gas. What happens if you heat up (add energy to) that gas? The molecules inside move faster as they gain energy, meaning they increase their speed, and they spread out to take up more space more quickly. But what happens, instead, if you heat up gas that's enclosed in a container? Yes, the molecules heat up, they move faster, and they try to spread out, but in this case, they often run into the walls of the container, creating an extra positive pressure on the walls. The container's walls are pushed outward, which costs energy: the molecules are doing work on it! This is very, very analogous to what happens in the expanding Universe. If your Universe were filled with radiation (photons), each quantum would have an energy, given by a wavelength, and as the Universe expands, that photon wavelength gets stretched. Sure, the photons are losing energy, but there is work being done on the Universe itself by everything with a pressure inside of it! Conversely, if your Universe were filled with dark energy, it also has not only an energy density, but a pressure, too. The big difference, though, is that the pressure from dark energy is negative, which means we have the opposite situation we had for radiation. As the container's walls expand, they're doing work on the fabric of space itself!
So where does the energy for dark energy come from? It comes from the negative work done on the expansion of the Universe itself. There was
a paper written in 1992 by Carroll, Press, and Turner, which dealt with this exact issue. In it, they state: …the patch does negative work on its surroundings, because it has negative pressure. Assuming the patch expands adiabatically, one may equate this negative work to the increase of mass/energy of the patch. One thereby recovers the correct equation of state for dark energy: P = ― ¤üc2. So the mathematics is consistent."
The copy pasta is from the last few paragraphs on this articles. https://www.forbes.com/sites/starts...nergy-for-dark-energy-come-from/#e9ccb0a1268d
Edit: it can also be used to counteract gravity manipulation [http://
[https://www.space.com/20929-dark-energy.html