I am not sure if someone has created this one – New Lesson Blocker. Like no new lesson when
- Apprentice count more than 150
- Guru more than 500
- All Kanji of the level unlocked, and less than 90% of vocabularies in review Guru’d
- Level 58-59, and strict criteria not met; and checkpoints every 10 levels
The idea comes from this – Level Up Work Around, but in the end, prioritize vocabularies of the level.