Unless you put HP region debuff on him, the healing from base is just much higher than any damage you can do from medium to long range. This will probably be fixed fairly quickly so you only get HP back in an area closer to the floor.
Unless you put HP region debuff on him, the healing from base is just much higher than any damage you can do from medium to long range. This will probably be fixed fairly quickly so you only get HP back in an area closer to the floor.