For us the angels and saints in heaven are not dead. Jesus said, "Have you not read 'I am the God of Abraham, the God of Isaac, and the God of Jacob?" He is not the God of the dead, but the God of the living. Matt 22:31-32. Those who die in Christ are now alive in Christ in Heaven. All of our prayers are in "The Name of the Father, the Son, and the Holy Spirit"
Don't Protty's believe in a Guardian Angel? Did you ever request an angel asistence in childhood? It's the same thing.
Have you ever seen any biblical example of anyone doing that?