damsels would more then likely work, being there quick and fast to get away. When i kept lionfish, he was a nocturnal hunter, so i couldnt keep anything that small with him.
Im thinking that you'll be fine only becuase were talking dwarfs, which generaly dont get that large anyways. i would say a school of 6 would work, provided you have good filtration/water movement and LR, and good tank cleaning practices.
Another good thing to watch out for are the fin tips being nipped by the damsels. Most likely will not happen but theres always a possibility.
Good luck