Guys i encountered the exact same issue and managed to solve it. The key is that if you already have two source points at hand and seek the third one from her then you must first enter the Hall of Echoes for a second time and master the source vampirism skill which would proceed your 'Power Awakening' quest to the stage that requires you to obtain the third source point. From that point on you can talk to Hannag about mastering source and initiate the 'On the Ropes' quest. Hope this helps.
No, unfortunately not. We already completed the ritual a second time, right after we dealt with Mordus. Yet, Hannag didn't offer the quest.