At the Transfiguration, Our Lord was conversing with Moses and Elijah. Were they "dead mortal humans" while conversing with Christ?
And Christ himself said the Father is not the God of the dead, but of the living, the God of Abraham, Isaac, and Jacob. Are they "dead mortal humans"?
The idea that some dead or more powerful in heaven than others is Scriptural? The idea that we can pray to dad human mortals to "intercede" instead of praying to God through Jesus (gee, I remember something about praying to God in Jesus' name as the way it goes) is Scriptural?
The idea that a group of living mortal humans gets to appoint which dead humans have this power is Scriptural?
Please show me the chapter and verse.
Christianity is pretty simple. Jesus is Lord. --> Catholicism has created a top-heavy heavenly bureaucracy that the AFL-CIO would envy. Give me 8 hail mary's, fill out these forms in triplicate, sign here and here, initial here, here and here, get St. Peter to stamp this page at the next window if he isn't out fishing again, and we will have Jonah get this to Mary so she can intercede for you.
Seriously, just praying to Jesus/God is a lot less hassle.