I've had some success in stacking potshots on the same strand of rope. I attach the first bag to the rope and throw over. I then put a carabiner on the next potshot and then clip it to the same rope allowing it to slide. I then attach thin cordage to the bag so I can retrieve just the one bag to re-throw if needed. If I throw each subsequent bag a little farther, then pulling on the rope catches each and stacks them. Or, if I'm high enough and there is not too much debris on the throw end side, I can even finesse the rope to get the next 2-3 potshots to slide down if stuck and hook together. Now I have a single strand with multiple bags weighted on the end for my ascender. However, as you would expect, the trick is getting the bags to really slide down and not independently get stuck away from each other. Using multiple strands to batman up seems to have more consistent results. A downside is arm strength and fatigue. I've also heard of using a prusik on all the strands, but haven't tried that nor convinced that 3+ strands would work that way. May I draw on the experience and observations of you all?