Nova is suppose to be weaker then Firelord everybody says and even she destroyed a Planet what could aquaman do against that?
Firelord-Strength level: As a consequence of his cosmic form and metabolism, Firelord is far stronger than a human being. When he channels his cosmiic energy into acts of physical strength, he can augment his musculature to enable him to lift (press) 50 tons.
Known Superhuman Powers: Firelord possesses the ability to manipulate cosmic energy in the form of stellar fire. His entire organic carbon-based body was transformed to accommodate the nuclear energies that course through him. These energies make him the humanoid equivalent of a miniature sun. Projected from any point on his body at mental command, Firelords energies encompass the entire electromagnetic spectrum possessed by a star: heat, light, gravity, radio waves, and charged particles. The maximum amount of energy he can produce at once is determined by his mass. When all the atoms of his body are in fusion, his energy level is equivalent to the outer layers of a small star. By the slightest manifestation of his stellar powers, he can burn through any Earthly substance (with the exception of Adamantium). He can project a stream of fire resembling a solar flare for distances measured in the hundreds of miles. Firelord can control the path of his cosmic fire to such an extent that he can project a sustained ring at a fixed distance around a person or object
By utilizing his cosmic power uni-directionally. Firelord can fly at near-light speeds through interstellar space. (Flying at such speeds near planetary bodies, however, could cause devastating gravitational disturbances.) Firelord can even traverse hyperspace without danger to himself. Firelord uses the gravitational fields of stars to help him break his speed.