I have done his quest line with 2 different drakkin characters and to get him to talk to me both times I did all the tradeskill quests to 54 and was kindly.
The Breath quests are faction based. If you don't have sufficient faction, you won't get the continuation dialog. I did the first 4 newbie quests with my Drakkin cleric, Welcome to Our City and the 3 Getting to Know You quests, and after that, Osh'Vir gave me a different response that allowed me to start the Breath cycle of quests. I didn't check faction during the 4 newbie quests but when Osh'Vir gave me the Breath quest I was Ally faction.
Reakash, Councilmember, says Vasha, Kicc. Welcome back to our chambers. If you have not spoken with Osh'vir yet I would suggest you do so. You may learn something of yourself through her words."
hail response: Osh'vir the Windspirit says "You have given us the gift of your good will and I can feel the pureness of your intentions on the breeze. It is my lot in life now to protect my drakkin younglings as well as those who might fight for our cause -- to protect and strengthen Veeshan's children. You are as close to being one of my kin as any that does not share my blood. As I commune with the spirits, I learn that there is much work to be done. You must know that your efforts are felt in my heart, proudly."
I'm getting no response from work to be done, or i am willing to work, maybe not the right response, but somebody must know.