One caveat: I don't have a hunter higher than level 26, so take what I say with a grain of salt. As you said, CC is a good idea. Make sure you're actually traited for CC to make it work as best as possible for you. Use bow-chants, crafted traps, other Hunter consumables etc. Everything you possibly can to give you better odds. Don't forget to use a hope token to fight off that dread the Nazgul gives you, and eat food that gives you ICMR. If you absolutely have to, run a few skirmishes and trade in some marks for a token to use your skirmish soldier on the landscape for a short while - just long enough to finish the combat in that quest. Also, if you have a captain friend, have him buff you (Motivating Speech and Tactics: Relentless Attack). If you have any destiny points left (And you are VIP), use some to buy another +1 hope, mitigations, damage bonus, etc. Hopefully some of that will help.
I would suggest gearing up your toon then, 832 agility is quite low. I actually had to go back and watch a youtube video of this quest because i couldn't remember it at all, I flew through it with my hunter (and 5 other toons as well) and never had an issue.