Technically XIanxia Mod got one huge reason why anyone would attack camp. IF PC would start his/her carrier as soul cultivator that is cruel comunity which wouldn't fall short of attack PC camp just to stop it progress or rise to fame/power
Some more fitting to orginal setting is...regional demonic overseer. I mean Zetaz was just an imp that was suppsoed to drug each new champion and drag it to factory. I not belive he was directly commanded by Lethice so...where the hell is that inbetween demon officers? Especialy after Zetaz failed his task why none of them send anyone else to check portal? That another reason why we could get some camp attacks.
Factory could be either start of them or breaking point for increasing rate and power of each attack. There should be card on Revamp Trello about attacks on camp.