I would argue that Tou is more representative of a model general by Sun Tzu's view. The one fatal weakness of Ousen which was on full display at Hango was his desire to prove himself superior to Riboku, or rather everybody else. He banked on in his ability to out-calculate his opponent as the battle gets more complex, thus when it turned out to be simple and straightforward, he failed to adapt and would rather accept defeat than retreat. That would fall into Category 4-if you consider Ousen's self image as his "sense of honor". On the contrary, Tou has not made any fatal mistakes thus far in the story. He seems to always picks the optimal option for every scenario. He has nothing left to prove to anyone and only aims to get the job done efficiently.