Funkle, that's the older illustration that I've already critiqued last night, same as the last critique, as of tonight. Way to go on your remarkable and amusing action and proportions. I am so in love with your rough sketches and sustained body portraits.
My tinest suggestion to your proportions is that most of the figures are perfectly and extraordinarily proportioned, but I'm not getting enough of the fundamentals of drawing proportions and angles (relationships). How about you check out your figures in perspective? All you have to do is, take a few poses you've roughed out, and then you'll fit them into the vanishing points from this link here, and the Figure it out perspective book, using your custom 2 hour class drawing, using flipped horizontal images. The reason is clearly, so that you'd be getting into drawing the edges and relationships more intuitively, using your right side, over your left side of the brain. See Drawing on the Right Side of the Brain.
Good luck to you and I hope this makes sense, and helps.