It was a great idea, but the implementation is horrible. They basically told us to build up our bases and stock up on loot to get ready for this new purge system, yet it doesnt work as inteded in so many different ways. Every purge ive triggered so far either fails to setup their base (for no reason) or quits after a couple of waves saying they cant reach the coffer. I moved my coffer from my orignal loot room because i knew it would be too complicated for the purge to work. So i made it easily accessible (multiple stairways and entrances, not far from my main gate where they try to break in and the purge still gives up halfway through the battle. Its almost like you need to put the coffer right behind the breach point, otherwise its too complicated for the purge to figure out how to reach it. If there were going to be special parameters put in place for the purge to work correctly, it should have been made known to the player base last update so we could properly prepare.