I don't know how to do this myself; I don't know how to use the map editor. If someone gives you a tip, I suggest you do the following: don't make the stats so high; calculate the stats of a summoned phoenix with 40 spell power and round its stats up to the last digit (the largest one). Phoenixes are already difficult to kill, and these "witches" will be virtually impossible to defeat. And adjust the creature's level (make them level 8), otherwise, the hero will kill them with a single attack.