AnonXS
commented
7 years ago can confirm, but just for this quest, escort questmobs are attacked by other mobs, but wont assist player being attacked or attacking mobs, but thats more of a general issues with their AI. They should set an general escort faction in their core script.
UPDATE `creature_template` SET `faction_A` = 35, `faction_H` = 35 WHERE `entry` = 20281;
should make for an easy quick fix, depending on the demons factions.
The escort NPC for the quest "Sabotage the Warp-gate!" in Netherstorm does not interact with the quest mobs in any way. I was able to just sit on a flying mount and completed the quest without killing a single mob (both the world mobs and the waves spawned by the quest ignored the escort NPC).
http://db.hellfire-tbc.com/?quest=10310
I think this issue is not limited to this particular quest, but I do not know if it is completely universal to all escort quests as I have not done them all. The robot chicken quests in Azeroth (Hinterlands, Tanaris, and Feralas) also ignore enemy mobs and are ignored in turn. If this is part of a larger known issue with the scripting for all escort quests feel free to merge.
Escort NPC: http://db.hellfire-tbc.com/?npc=20281