Seems it happens in all of Kael where there is "good" npc. A single char can keep a big stretch cleared using the giants for tanking/killing. Can there be a hot patch where something is done with it ? Seems it happens in all the zone. It is kind of zone disruptive, and history said it was not possible in LCE and in SoD it was also changed and made harder. It is used for killing normal mobs but also named ones.