With his four summoned creatures, Jason estimated that just keeping them summoned would take all of his mana regeneration soon enough. Even more, if they keep using magic. His best option was to focus on the red orc and king troll, who didn't use that much mana, but instead of that, Jason wanted to increase his mana regeneration.
"Well, for now, let's take a real break and rest through the whole night," Jason thought.
Before falling asleep, Jason had a moment of thought regarding his strategy and progress. He realized that some of his titles couldn't be improved simply by clearing the same dungeon repeatedly. This made sense because the difficulty level of a dungeon decreases with familiarity and experience. Essentially, the challenges that once pushed him to his limits were now becoming routine and less impactful.