This is more of a question than a suggestion, as I am not familiar with game mechanics. In The Awaking Part 4, my Avatar spoke about how there might be magical/technological Gates on Monria allowing creatures from around the universe to gather here, and that would explain the endless numbers of creatures here. Can the wave event areas be marked with Glowing Runes on the ground, or perhaps an obelisk in the center? This would help new players by letting them know they are about to enter a wave event area. Also the wave event area could have a low wall around it to better define the area, with only a few entrances. This would also help to keep the wave creatures within the event area so they do not mix with the normal mobs outside the area.