In the Bible, nowhere it states that you should pray to saints. If you look closely in Ephesians 6:18 NKJV, it says to pray FOR all the saints not TO the saints.
Praying to saints is a from of witchcraft. It’s praying/talking to dead people. God prohibits us from doing those practices. If you look in Deuteronomy 18:10-12 NKJV, you will see that God strictly prohibits talking to dead people “ or one who conjures spells, or a medium, or a spiritist, or one who calls up the dead. “
Even more, you can see in 1 Timothy 2:5 NKJV, that the only Mediator we need between God and us is Jesus Christ.
Furthermore, it is written that if we ask anything in the name of Jesus, we shall receive it (John 14:13-14 NKJV). Not in the name of Mary or Paul, the name of Jesus. It is the only name that is above all other name (Phil. 2:9 NKJV) . The only name that can heal. The only name that can save . The only name that can make your prayers be answered, the name of Jesus Christ the Lord of lords .