(lower weights can give a nice shape to your guys without the style taking over)
Due to the dynamic poses, there's a lot of bad anatomy. Use a strong negative prompt to help counteract, and expect to try a few times. You can use specific positions and 1boy vs. 1boys to help specify as well.
Here's a good starting point: (physical-defects, unhealthy-deformed-joints, unhealthy-hands, physical-inequalities:2), (gnarlysick-neg, EasyNegativeForAnime, ByBadArtist-neg, deviantart, bad anatomy:1.5).
I'd love to see what people come up with!