I did like the "take over the cosmos" voice. But, it is a little difficult to tell some of ur voices apart. I did notice Sword Art Online music during that part. It could have been a little louder. The screaming could have been done better. Try slowly sliding into the scream. Start with a small one & slide it up. Or try getting further from the mic when u do it. That way you'll get the energy of the scream but not the sudden "boom" of sound.
Btw, u can never not have energy for manga.