Hey, like the art direction, and everyone likes some gratuitous titties every now and again. Thought that, since you're getting better in strides, you might want a little lesson.
I'm tired, so I'm only gonna look at the one last action from, with Rick and Bobba Fett there. The action is flat and stale, you want it to be like "POW YOU GOT KNOCKED THE FUCK
OUT" instead of 'I boop u now...boop'. So onto dynamic posing!
Start with action lines. How do you want the characters moving, what's the force, what's the direction, stuff like that. Here I've done a very small thumbnail sketch of the punch and block actions from a more interesting angle. I kept the action lines as 'arrows' in pencil, see how they all follow something? The arc of the punch, of the bodies, of the forces acting on each figure. The figures are built around these action lines, I outlined them in pen for easier viewing.
Now that we have a decent pose going, copy the skeletons into a bigger area and start fleshing out your figure with 3-D shapes in mind. I don't usually do the boxes and spheres thing so forgive me if it looks like reheated turd, but they really help. Imagine your character is a robot made of weird boxes and wedge shapes, so you can better see it as a form with depth.
Okay, now Cross looks like he's a people! Notice how the torso is deformed and not a straight rigid shape. This makes it look like his torso is shorter than it is, and his legs are higher up. Don't worry about stuff like this, body's contort all the time, it's natural. Also notice how I'm not worrying at all about the right leg and left fist. Most of that area will be covered by our old pal Rick, and not detailing distant parts like the leg add an illusion of depth while also allowing you to be lazy as hell.
It's getting easier now, because you're starting on a solid base. Add whatever details necessary to show who the character is, like armor or clothing or dome helmets straight out of Space Ghost...
Then ink that shit! if you're feeling fancy (I wasn't) you can add thicker, darker lines on shadowed areas and leave the outline thin in highlight areas. It's really up to you, just take your time and try to map out where you'll put lines. I did a really shoddy job with the clothes, I've never been good at them, but you can see again how the folds follow certain mini action lines. Now you could stop here, but why not go one step further and shade a little?
This is where that whole 3-D shapes thing comes in handy. After deciding on a light source, it's much easier to imagine where the shadows would fall on a box compared to a whole arm. By mapping out the forms, you get a better sense of where to go when it comes time to add shadow and highlight. By the way, DO NOT SHADE LIKE I DID. It looks terrible, I just wanted to show you where
to shade, not how.
Hope this helps a bit!