Yes, we can ask Mary to pray for us as also all the other Saints. What is so hard about that? We pray to Mary and the Saints to PRAY TO GOD for us. We do not look at Mary and the Saints as our Savior, because our Savior is Jesus Christ, but we pray to them to pray for us to God.
But you will probably reply, "Me, pray to dead people?", and I will answer you yes, because they are not dead but alive in Christ.
And about 1 Cor 2:2, what makes you think you can project the message that Paul was saying without properly interpreting the text? Sola Scriptura has screwed a whole lot of people up when it comes to theology, it is not an Apostolic Teaching.
Sola Scriptula was good enough for the Bereans in Acts 17:11.
Not only did they receive Paul's teachings with eagerness, but they actually examined the Scriptures every day to see if what Paul said was true.
Which "Scriptures"? Law and Prophets? What was WRITTEN?
By this time in Acts, Jesus has already risen and ascended to Heaven. Paul had already met with Peter, James and John in Jerusalem. Paul learned from them. They all "compared notes", if you will.
If there would've been any thing else added, say like, consulting the dead or "previously alive on planet Earth", putting more focus on Mary or whatever, Paul would've learned it and included such things in his Epistles.
He did not.
Instead, he warned of people like you who come with "another gospel" than what he, himself, taught.
In going back to the "Scriptures" that the Bereans had, check the Law and Prophets. It does NOT say, "a virgin shall give birth and she...." anything.
Sure, all the angels and saints may be in one accord with God in His Will: that all be saved. But it does not mean to pray to any of THEM to pray to God when Jesus taught to go to God, Himself. The parable of the ten virgins: YOU go to WHERE they, the five with oil, WENT to.
Outside Scripture is a slippery slope. It's where things like wearing Mary's scapular or using prayer beads (rosary) to pray the same request to Mary over 50 times in one sitting alone.
It's where you wonder just WAS Mary a virgin all her life or not. It doesn't REALLY matter for the Salvation of mankind wether she did or not. It didn't change the fact that Mary WAS a virgin and gave birth, just as prophecised to be a SIGN for the coming Messiah.
So, again, I say that this whole thread is meaningless and is a waste of time.
If you INSIST on investigating and/or discussing whether or not Mary remained a virgin after Jesus, it is not necessary for Salvation and not a requirement for getting into Heaven.