Hi, DarkNLovely
actually, the Saints - and the rest of us - have no power in prayer. When James (Iakovos) says that "the prayer of the righteous is of much effect" (I'm paraphrasing), it is more accurately "the prayer of the righteous man, energized, is of much effect." The 'energizing' is the action of God. Christ said that when He left, He would send "another Spirit"; it is the Holy Spirit who remains with, sustains and comforts us. It is through the Holy Spirit that we have communion with Christ, and with one another; it is through the Holy Spirit that we are the body of Christ.
Our interactions with one another, and our communion here on earth are through the Holy Spirit. At least twice, Paul is physically absent but knows about others far distant. In Acts, he hears the prayer (paraklesis, beseeching) of the man from Macedonia. In 1 Cor 5:3, Paul recounts that though he is absent in body, he is present in spirit and therefore knows the condition of one in that Church. Clearly, these things do not occur through the "power of Paul", but in the Holy Spirit.
As the body of Christ is not divided, but united through the Holy Spirit, the Saints who are not physically present can hear only by the grace of God. In this sense, no great or greater 'power' is attributed to any person. Instead, our requests to the Saints
confess the undivided nature of the body of Christ, the power of the Holy Spirit, and the glory of God.