Come on, if you can't see how superior cents are to any locked room scenario, you are just daft. The most important difference being that we know where the locked rooms are and can avoid them, we don't always know where cents are going to be set up. Well, actually we do, any place where you have only one direction to flee from a summon into a set of centurions with someone else waiting there spamming murder gangkee. Which of course could be in a hundred different places.