There is a few world events like the death-walk to Balthazar temple, where the upscaled AOE enemy kill all the friendlies with one hit…
There is impossible to defense or heal them, against a wave uses large AOE-s, and have scaled to 10+ people… When they and the AOE effects show up (culling makes it harder too) the shields died already, morale is lost and the event is failed… :C
Please scale at least the NPC HP on defend-events with the foes!