How exactly do spawn times work for the legions?

The basic spawn time for legions is 70 hours. There is, however, a random deviation of +/- 4 hours. That means, the base value might be anywhere from 66 to 74 hours.

As soon as you are competing with a legion, the basic spawn time is reduced by 3 minutes for each power point that is being used in fight. That means: if you are using many strength points, the next legion will arrive quicker. If you are not fighting that much, the basic spawn time won’t deviate much.

Should you be fighting a lot in a short period of time, you will not only face more legions – the legions will also have more health. This is being visualized in the game by the resistance bar – the higher your resistance level, the more likely you are to encounter legions with a lot of health.