I've both MTed and OTed Nightbane, and although a warrior is prefered for MTing, him and OTing is easy on us, It's still possible to MT without loosing people!
Our guild currently does not have any raiding priest with Fear Ward, so I had to improvise.
Tremor Totem will go a long way, but you can't rely on it. The best thing to do is buy the epic PvP trinket, (2 min cooldown), Make macros for Shields to cast and cancel right away, and rotate them, starting with DS, since it has the longest cooldown. This will give you several fear breaks, that will always have one up for a fear, since you'll get some cooldown relief from the Air Phase.
Now go tank him, and get some epic lewtz!
