Now it’s better to use Nel’s help exclusively for leveling up Celica. Because in principle she may not use the treasure finder.
To obtain rare artifacts, Celica herself must act. Because you need a series of victories without leaving the scene and a treasure finder.
To speed up battles, choose the best clothes for Celica (for example, an elf outfit), develop her skills and use magical artifacts, potions. And also don’t forget to improve your equipment.
To prevent characters from getting carried away with unnecessary sex during battles, you need to monitor their sexual openness (the lowest scale of parameters is responsible for this; for normal behavior this parameter should not exceed 30).