Class restoration quest issues

To receive the class quest, you must finish the "Covenant" quest from the NPC Cray Morif.
Note: you may find Cray Morif near to the Darkfall entrance (4293, -1884, 34).

If you don't see "Covenant" quest from NPC Cray Morif:

Please confirm that you have already finished the Orange Study quest: ("Growing Pains" quest chain). 
 
"Covenant" quest should be available after "Toughening: Darkfall Return".

Once you'll finish "Covenant" chain of quests, you will be able to proceed further with the class quests.