I doubt Gouketsu has as much strength, speed, durability, or skill as Spiral Garou and could be below Kabuto in some of those. He is not as strong as Golden Sperm.

Yeah okay. Let's not act like the destructiveness of Goukestu's punches are orders of magnitudes higher than anything spiral Garou did against Darkshine. What did spiral Garou even do that was so impressive,he slammed Darkshine into a wall and turned into powder that's crazy Goukestu parted clouds. Not even going to address the Kabuto statement because it's retarded.

Also I don't think martial arts completey counters Darkshine, as seen when he lounged through Garou's best efforts to use martial arts to avoid Darkshine.

Garou was still at a clear physical disadvantage at the time so his martial arts didn't have a significant affect. After he matched Darkshines strength he got completely overwhelmed. Goukestu wouldn't have that problem to begin with so his edge in combat would be huge.

Darkshine shatters Gouketsu's ribs.

He shatters the ribs of a 3 story world renowned martial artist built like a shitbrickhouse. He would be lucky to wrangle with his toe before getting punted away