This version of Libram Paladin is focusing on adding more healing and control to the basic Secret Libram with the inclusion of the High Exarch Yrel and the tweaks made in order to fit her in. This will help you slow down and beat those pesky aggro decks in this meta (Face Hunter, Aggro Shaman, wtc.) with decisive swings, or give you the edge against other midrange decks (Rush Warrior, or Menagerie decks), also you can sustain longer against control than other Libram variations.
To give you tools to deal with N'Zoth boards or aggressive agro starts, Lord Barov is also included... keep the 1 cost random Broom drop for it. You can also switch it with a much cheaper Libram of Justice or Consecration.
The cards you can double or play with in case of missing stuff are Devout Pupil, Sword of the Fallen and Libram of Judgement. Also, you can always add extra secrets (2nd Reckoning being the best in my opinion), Hammer of the Naaru or an unorthodox Argent Braggart.