Alena, John, Markus, Mira, and the others already spared around. Currently, they are in charge of making those arrays in different cities. In every City, they wanted to make one stronghold so that they could easily evacuate all the people of that city into that place.
Naturally, this will also take a long time. But other than that they did not have any other way to create those strongholds. On the other hand, today is the first day of the annual college competition.
Even though none of the Saints were able to present in the competition, nobody had any problem with that. As everybody knows all the Saints are currently busy creating the stronghold so definitely they will need the time to focus on those projects.