At some point, the enemies loosened their grip at the frontline. All of the high-end enemies suddenly stopped coming, and the weak enemies appeared again to take the front.
"They want to lure us to expand the area we control…" The king and other high-end masters saw directly through such a scheme and didn't fall for it. They exerted much control over others, to not let themselves get carried by the heat of battle and expand outwards.
Soon enough, the scary enemies returned again. When the enemy leaders did such a trick failed, they returned to send their top elites to the frontline. And this time, they sent lots of them, enough to put immense pressure on the high-end masters.
The king even felt at such moments that they wouldn't succeed in defending the area anymore. He started to arrange things at the base, knowing that they were going to return back to point zero.