In each of the LUK SIU FUNG stories, the protagonist/title character encountered at least one powerful enemy. They were:
1. Book 1: Fok Yau; Fok Teen Ching
2. Book 2: The Embroidery Bandit
3. Book 3: Yip Goo Sing
4. Book 4: Yuk Lor Saht
5. Book 5: The Wooden Taoist/Old Sabre Tyrant
From there, I'm not sure what other major enemies Luk Siu Fung encountered, except that the most powerful of them was Gung 9, whom I left off this list because he's way too powerful (we'll revisit him shortly).
If these LUK SIU FUNG villains fought in a free-for-all situation, which would be the last man (or woman, if that's the case) standing? Also, would their combined force be sufficient to take on Gung 9?