To Charlie, activating his pineal gland was his top priority at the moment.
Not to mention what fierce beasts lurked within Mount Tason, just dealing with Fleur alone made him feel inadequate. Now, even though Fleur had temporarily retreated, it didn't mean she wouldn't come back in the future.
Moreover, she was his mortal enemy, and even if she never returned to Oskia in the future, he still had to seek revenge. Therefore, he had to quickly find opportunities and activate his pineal gland.
S