I'm not sure what you mean by the 'gift of exorcism'. As far as I know, this is something that a priest may be able to do, and there is some kind of rite for it (I don't know exactly what it is, but you can read a little bit here
in a previous thread), but it is not as a layperson might do by praying over a person.
Prayer and fasting...well, those are obvious, aren't they? And it's true: Prayer and fasting does cast out demons, but by the power of God, not any particular ability given to us as individuals. If it were that simple, then all Copts would be expert demon-cast-awayers after fasting for the vast majority of the year. Alas, that is not the case.
1Cor12:9 To another faith by the same Spirit; to another the gifts of healing by the same Spirit;
I am still a bit confused. Ok, let me take gift of healing as the example.
Without the gift of healing, we can still heal or help the paitients through fasting and praying. Just pray for the patients, God listens our prayers and He may heal them. Why does God still have to give us the gift of healing?
A Christian who possess the gift of healing can heal patients either through the gift of healing or through his prayers. What is the difference between healing the patients through 'the gift of healing' and through 'praying'?
The Gift of Healing comes each and every time through prayer. Even the slightest prayer. . . again going back to humility. The gift of healing is not a gift you have at your ready disposal. . .it is granted one time for each time - and each time it follows humility. Each and every time it follows humility because it's not our will that grants healing, it's HIS.
If it were our will, we would heal and heal and heal and heal. . . and take the very things that help those souls to repent, taking their very repentance from them. Who are we to judge what is the best action for that person? Only God knows. He sees the heart. We see the skin, the expression on the face, the sound of the voice, the actions. He knows, we are blind. He knows exactly what that person needs.
The Gift of Healing is not a tool wielded by us. It is a GIFT to the person receiving the healing. WE - if that specific gift manifests, are only the vessel in which the Holy Spirit HIMSELF is DOING HIS WORK. We are nothing more than the pot . . . or pitcher. If we put a pot or pitcher on a shelf, it has no will or way of making itself DO anything. Only the owner of the pot or pitcher can will that pot to do anything by holding the pot or pitcher and using it as a tool.
We are nothing.
He is EVERYTHING.
And He is so humble that even this action is done without fan fair and whooopla. We can follow that example. It's not about us. It's about Him and it's about the person needing to be healed. We're just the pot. That's it.
That one instance of healing doesn't mean there will ever be another. It's up to Him and Him alone. He can give, He can take away. Prayer is necessary every single time because this is a relationship. . He's not a candy store. He's a person. He's God.