Romans 8:27: And he that searcheth the hearts knoweth what is the mind of the Spirit, because he maketh intercession for the saints according to the will of God.
I Timothy 2:5: For there is one God, and one mediator between God and men, the man Christ Jesus;
I Timothy 2:6: Who gave himself a ransom for all, to be testified in due time.
I Timothy 2:7: Whereunto I am ordained a preacher, and an apostle, (I speak the truth in Christ, and lie not;) a teacher of the Gentiles in faith and verity.
Christians are commanded to pray for one another. All of our prayers pass through the mediation of Christ Jesus. However, we're still -- by definition -- intercessors, interceding for the church and the world, not instead of, but through the mediation of Christ.
If you don't believe that, you need to take it up with Paul, who specifically commands intercessory prayer in 1 Tim 2.