I'm level 33blm/16whm I am some what close to the entrance. But we always have people who are stupid and try to pull from the rooms. Once my brothers friend started yelling for people to open the banishing gate and 40 high level bats, Nortorious Monster, and a couple evacuee mages came running behind him. He did it on purpose too. Luckily my brother was too far back to hurt and pretty much everyone died.