Rita and her teammates are currently resting to recover The lost energy. Every one of them will be going outside of the Dungeon 5 days later so before that they wanted to kill as many monsters as they could. This could be the first time for everyone to fight those Monsters without fearing their death.
All the teachers who protect them will always interfere when their life will be in danger. But naturally, that does not mean they will become reckless and try to target those powerful Monsters who can easily kill them. With this none of them went inside of the inner area.
They are just around the outer area where they fight all the Monsters who have the same power level as them. Some time ago they already fought a group of Monsters and by fighting them they almost used all of their Zen energy, so they are currently recovering.