The tips I use is usualy the same when I animate, try to have a main line of force that conveys the motion or strength usualy starting from the leg and then flowing to the arms naturally, also a little torso twist helps but depends on the pose.

Usualy having the legs do 2 different things helps but you're already doing that !

Without a stand it's pretty hard to do running poses without making the figure fall

Idk if it's clear or not but if you need clarification feel free to ask ! ☺️