Okay. I'll leave 13 to 15 to leave room for doubt. I've also altered the rest accordingly (I haven't altered from the top 4 upwards because I don't think they're stronger than this).I think Yang Gan should be 15 since with some comfort implies that the 12 wouldn't really be that hard for him
Top 10 of MC Sect:
1. Yang Gan. = 13~15 yeongs
2. Tang Bo = 10~11 yeongs
3. Liu Jiawei = 7~9 yeongs
4. Yang Mu = it is insinuated that he is Muchen's rival, so 5~6 yeongs
5. Chu Muchen = 5~6 yeongs
6. Fu Yinuo = 4~5 yeongs
7. Su Da = Probably the same as Su De (3)
8. Su De = 3 yeongs
9. He Gang (before Qi) = ???, probably 2 or 3 yeongs
10. Tang Ruo (before the Rogue Hunt and without transformation) = 1>X>2 yeongs
Honorable mentions:
Long Chen = 9~10 yeongs (relied on his regeneration to win his fights)
Xiwen = LC called him weak, so 7~8 yeongs, probably higher today
Blood Hunter (full power) = 13~14 yeongs (described as slightly weaker than Yang Gan)
Prince Song = 13~14 yeongs
Young Wu Chao (PH) = WC>15 yeongs (How? I don't know. Am I wrong? Possibly)
