I've gotten fairly proficient at doing "person posing" but I definitely feel out of my comfort zone with multiple characters in the same piece (especially balancing the layout / focal points)
When I was a kid I remember being stunned at some of Larry Elmore's Dragonlance book covers, loved how he incorporated multiple characters on a relatively small area. So the plan is to do some master studies focusing on that. Going to limit the time, start with ~90 minutes and slowly get closer to an hour, just to keep me from getting too much into detailing.
First one last night. Pretty sure this was Dragons of Spring Dawning.