I just tried this plugin and I can't set them to attack properly. When hostile or defending they shoot at me but obviously just damage themeselves. At the end they kill themselves with their weapon (0 distance).

These properties I keep as default:

"damageAmount": 10.0,
      "damageDistance": 3.0,
      "damageInterval": 2.0,
      "attackDistance": 100.0,​