Assault on the Stronghold/Zaishen Quest

Summary

 * Assault the stronghold and free the Ebon Vanguard captives from the Hierophant Burntsoul.
 * *BONUS* Complete the mission in Hard Mode.

Dialogue
''The Charr heirophant [sic] has captured Ebon Vanguard soldiers. Seek Roan Fierceheart to partake in any assault on the stronghold. We are the fierce.''
 * Accept: "I can do that!"
 * Reject: "No, I'm way too busy today."