We have done the same thing with Demon's Pass. It now operates off spawners and spawn waves. It will probably not be quite a rewarding as it was previously, but we have cleaned it up considerably.

There are no longer any demons, it is not strictly undead.

For both areas (Necropolis and Demon's Pass), we will be adding several more mobs, quests, honours, and bossmobs in the next couple of weeks.

One more thing I did not mention. When the final wave is defeated, it will take about 30 minutes before the entire process resets and populates with mobs again.

Penned by my hand on the 4th of Tenebrae, in the year 16 AM.