I think it’s great to see more Sentinel guilds - there’s only one at the moment, and variety is the spice of life!
That said, I do have a little question.
This kind of made me wonder; why do you not take Worgen? Worgen have been shown to be able to be Sentinels as Moonclaws, and we also see the Moonclaws in Darkshore (Adella, Silvia and Tambre to give three named examples). From your description, I guess you’re trying to go for something along the likes of the <Army of the Black Moon>.
Second, since you state you accept all classes, does this mean you’ll accept Death Knights and Demon Hunters if the story fits? We don’t see those two classes fight as Sentinels, so that’s a curious choice to make.
All in all, I think the concept needs a little more work and a little more research, but I hope it can a great addition to the Night Elf scene in the future! I’ve also added you to the Night Elf RP thread.