Riboku implied he might be the strongest so he's deffo not last
Also I dont rate Yotanwa and Tou that highly
I could see Karin or Moubu being above Kanki in the future tho
Riboku hasn't fought any other at that point but Ousen who defeated him.
Tou no question for me that he's individually superior. I said in another thread recently that I can still see Kanki beating Tou due to their armies.
YTW has a shit ton of hype and her martial might is pretty insane.
Moubu? That isn't a question. Moubu is arguably No.1 in Qin rn even though I think he looked like a chump against Man'U.
Kanki is smart but he doesn't bring much to the table other than his intense mindfuck which is too dependent on scenario. RBK falling for Kanki's ambush was an OP level plot stupidity moment.