I’m not JMG but I’m somewhat well-versed in planetary charity. May I ask why you chose Mercury for this situation? Mercury assists with communication and travel, but not really what your daughter is going through. In fact, Mercury is mercurial in some ways and I wouldn’t personally approach him at all for someone dealing with mental health issues.

Have you considered the Sun/Apollo (for health) or Jupiter (general abundance, justice)?

Perhaps the Moon is another option.

I wish you luck.