use teleports wisely + there are safe spots where enemies stop chasing. In the beginning, there's a spot near the dwelling of beasts, where the earth elementals and shamans are; if you stand there, the enemies will run back through the portals, and after waiting a couple of days, you can move on with a significant lead. Also, logistics and the Path of War are essential skills to upgrade.
What should I do with the second hero who appears after 3 months?
"where the earth elementals and shamans are" can I get extra defense there? Is that the place?