About the K'Hara ship which controls the mirrorshare, I can't really help you there, since I'm not experienced with K'Hara that much. But I'll do my best to bring someone who can answer you that question.
Good luck!
P.S. The Search option functions very well, before posting try using that feature, if it doesnt help either ask any [Angels] or post a thread.
K'Hara|Ninlil would be just another Nomad. There is no one Nomad which is above the others. The only real differences would be Caste differences, and that's a completely different subject on it's own.
K'Hara|Harbinger, K'Hara|Ninlil, K'Hara|Nusku, K'Hara|Mammetu, all of those larger entities? They are still on the same level as the rest.
Ps: I'm sorta curious on what would give you the idea that Ninlil was like that.