I looking for this event too and I see everytime some other people, who are waiting too. The event don´t restart and I send a bug report, but it don´t change something. Rage isn´t a weapon which is popular, but I like to do the achivment and if it is imposible to do the event, then they should take this event out or rework the achivment.I read in another forum, that if gw2 gets an update where they refresh the maps the event works.