A nice drill for distance and placement. Start by standing in front of each other. Gather the picture in your head and close your eyes. Now tell each other in turn to reach over with a limb and touch the other in a specific place. For example: Right knee to the partners left knee, left fist to parallel side shoulder socket. As you become comfortable try two and more and you can advance to light strikes as you go. Change placement or even do it while walking and so on. Have fun.