I've yet to get into an instance where enough people queue for it- I've been bouncing around maps all day yesterday & today trying to get into Castrum just to progress. I've pretty much decided it's a lost cause- Story being gated behind content like this, it's so disappointing & really sours the mood for me with the Bozja event. The timer needs to be lengthened for the event so more people can queue up in time & made so you don't need 30+ people to completely it successfully.