More importantly, we're not actually... Hitting him with a metahuman power.
Specifically, we're using Physics on him. "Heavy object going Really Fast does Big Damage".
That also minimizes his ability to deduce anything, which is already frightening given how he somehow determined that she was Novalight+ from a few seconds to minutes of battle.
The thing is, I don't want to test against his most iconic superpower (The fact nothing ever sticks to him), and I don't want to spend any more time locking horns with him in case he's actually a power vampire (Which would explain why he keeps going for her core). Full impact kinetic burst, we either go Through him and learn something, or he tanks it and gets punted through the universe.
He's good, but if he's "Can tank a relativistic supermassive black hole" good, we might as well give up right now.
But yeah, this is a point that's been seeded several times in the narrative already that Black Swan's flight speed is insanely cracked, this feels like the right thing to lean into, rather than leaning into our opponent's baliwick.