(Don't have time to fact check or discuss this until after work but this may or may not be relevant so might as well post now)

I don't remember him being able to absorb other people's energy in his sheet (this fact is the most likely to be wrong in my argument), so the way it seems in the post, couldn't he just be absorbing people's fireballs and stuff left and right? It seems to be near instantaneous because of how fast she sprung up on him unless he was able to drain her shields from a distance the entire time. If it was instantaneous, that seems pretty overpowered unless it wasn't able to draw as much energy from her as I'm imagining in that brief moment.