Apostolic succession is a myth. And beyond the historical value of their works, their writings have little to no value.
Again, I have a source that is far more reliable than writings of dead "saints." I have the living Word of God. If you cannot actually prove the perpetual virginity of Mary from the Bible, you really have nothing to offer that I would take seriously.
Acts 8:17
Then they began laying their hands on them, and they were receiving the Holy Spirit.
Timothy 4:14
Do not neglect the spiritual gift within you, which was bestowed on you through prophetic utterance with the laying on of hands by the presbytery.
2 Timothy 1:6
For this reason I remind you to kindle afresh the gift of God which is in you through the laying on of my hands.
Acts 11:30
And they did so, sending it to the elders by the hand of Barnabas and Saul.
Acts 15:2
Paul and Barnabas and some of the others were appointed to go up to Jerusalem to the apostles and the
elders about this question
Acts 15:4
they were welcomed by the church, and the apostles and the elders
Acts 6:3
Therefore, brothers, pick out from among you seven men of good repute, full of the Spirit and of wisdom, whom we will appoint to this duty.
1 timothy 15:17
Let the elders who rule well be considered worthy of double honor, especially those who labor in preaching and teaching.
Titus 1:5
This is why I left you in Crete, so that you might put what remained into order, and appoint elders in every town as I directed you
Acts 14:23
And when they had ordained them elders in every church, and had prayed with fasting, they commended them to the Lord, on whom they believed.
1 Thes 5:12
We ask you, brothers, to respect those who labor among you and are over you in the Lord and admonish you,
Acts 20:28
Pay careful attention to yourselves and to all the flock, in which the Holy Spirit has made you overseers, to care for the church of God, which he obtained with his own blood.
Hebrews 13:17
Obey your leaders and submit to them, for they keep watch over your souls and will give an account for their work. Let them do this with joy and not with complaints, for this would be no advantage for you
Yeah total myth.