The saints, including Jesus' mother, are not "dead."
As Jesus himself said, God is the God of Abraham, Isaac and Jacob and He is not a God of the dead but of the living.
Jesus testified that Abraham, Isaac and Jacob were alive, though physically dead.
You adopt the Sadducees position on this issue - not the Biblical one.
(2) Asking someone to pray for you is not prayer "to" them. As has been pointed out to you many times, Catholics ask saints to pray for them, they do not pray "to" saints they way one would pray to God.
You continue to build a straw man.
Simply because you labor under the delusion that saints who are physically dead cannot be alive in Christ and therefore cannot pray for us, does not mean that the Bible teaches such a self-contradictory doctrine. Mary is as alive today as Abraham, Isaac and Jacob were alive in Jesus' day and I will take His testimony on the matter of whether saints like Abraham or Mary are dead.
At the Transfiguration (Matthew 17:3, Mark 9:4, Luke 9:30) was Jesus talking to "dead men"? Or were Moses and Elijah resurrected specifically for that occasion?
Show me where the Bible says Mary is a Saint, that She is in Heaven, that She is listening to anyone's prayers while in Heaven and that it is ok to pray to her.
The Bible says no such thing.
The Bible says we are to pray to GOD alone.
And you know that.