Is it better to go to a raaqi if a person's mind wanders during ruqyah, or is a person's ruqyah for themselves better, even if it is less focused and perfectly recited?

The essence of ruqyah (definition) is for a Muslim to perform it upon themselves, as this is more conducive to sincerity and strength of resolve, which impact the efficacy of the ruqyah. Ibn al-Qayyim mentioned that incantations and Quranic verses are healing, but they require the receptiveness of the recipient and the strong resolve of the practitioner. If healing is delayed, it is due to the weak influence of the practitioner, the unresponsiveness of the recipient, or the presence of a strong impediment.

If a lack of concentration and proper recitation does not affect one's sincerity and strength of resolve, then it is better for a Muslim to perform ruqyah upon themselves. However, if it does affect sincerity and resolve, then it might be better to seek assistance from some righteous people who are experienced in ruqyah.