THE UNION OF NOBLE FAMILIES:
The Five Noble Familes are Huangfu, Murong, Nangong, Sima and Zhuge.
Huangfu always stands for the best healer in swordsman story ,almost never exception.since there is a healer role here,Im pretty sure it won't be change here.

Murong.the most famous martial art of Murong should be a CHI KUNG named North Star Transfer.It can transfer whatever CHI KUNG and maybe some KUNG FU to attacker himself ,if the attacker are strong enough,it produce a mirror and counteract the attack,else it simplely reflect the damage to the attacker,lol,the ultimate CHI KUNG skill.

It should be a clan hold the best healers and nukers.

BLACK DRAGON
This name used in some second-string story.It usually not the top clan,black was the same.
It always crowded of beastly combat killer.But it's obviously differ here.It becomes the top clan,has the strongest dragon Thunder Emperor,but something didn't change.It's so black and guess from the Thunder Emperor wields a scythe it should be a  warrior clan as usually.

Iron Fist
It should be a clan hold the best hybrid.
Frist ,it only receives high-level disciples who have cut their ties to their former clans, what roles are these ppl?
From the story sense ,since only hybrid  was design to be a loose-jointed role ,they have more communication with all kinds of ppl,their faith are more easy to be toppled.
Second,their dragons using Iron Fist techniques.
Third,only hybrid left,lol