Heb. 4:16 Let us therefore come boldly unto the throne of grace, that we may obtain mercy, and find grace to help in time of need.
Until you deal with these scriptures and somehow reconcile your beliefs with these (which you can't), you don't have a leg to stand on.
These scriptures you quoted are meaningless to this debate. They do not prevent any Christian from praying with other Christians or asking other Christians to pray for them.
This fear of Mary on the part of you proddies comes off as somewhat misogynistic, IMHO.