The only problem with it is that it is demoting Christ's job, to a level that any other pious, now dead/once alive, human could fill. We don't need celestial back-up. God hears us the first time. And when 2 here on earth are praying together, Christ is right there with us. He is the only thing we need to include in our prayers.
A human interceding on our behalf puts a feather in
their cap, as God sees their love for their brother, but once your prayer is airborne, only God's ear is important. And only He will make a decision concerning your plight. You don't need a cheering squad to get His attention.
Praise God. It lets Him know that you know who you are praying to.
Repent. Or your prayer will be a let prayer, not reaching God's ears. He can't hear a person drenched in sin.
Ask anything for anybody. Human intercession on behalf of another.
Yourself. Pray for your needs. Your conversation time with God.