In my theory that i have after re-read the fire Dragon arc, Tou let the youngster shine in that arc.
If tou could be the commander of invasion on Wei and them him brings all three Youngster Generals (Shin,Mouten and Ouhon) and let them conquer Wei?.
For example.
First Wei Great General Gohoumei is a strategist like Mouten, if GHM and Mouten face each other in a war, we have the matchups.
Mouten vs GHM.
Aisen vs Ranbihaku.
Rikusen vs Ryuu han.
Possibly a new Commander from Gaku Ka vs Jun'Ou.
Other side we will have.
Shin vs Gaimou.
And a new Generla vs Ouhon.
From here i think all three of them will be a GG in rank military and Tou the commander in Chief as 6GG, but him let all three of them conquer Wei, because him will have already Conquered Han or Yan.
If tou could be the commander of invasion on Wei and them him brings all three Youngster Generals (Shin,Mouten and Ouhon) and let them conquer Wei?.
For example.
First Wei Great General Gohoumei is a strategist like Mouten, if GHM and Mouten face each other in a war, we have the matchups.
Mouten vs GHM.
Aisen vs Ranbihaku.
Rikusen vs Ryuu han.
Possibly a new Commander from Gaku Ka vs Jun'Ou.
Other side we will have.
Shin vs Gaimou.
And a new Generla vs Ouhon.
From here i think all three of them will be a GG in rank military and Tou the commander in Chief as 6GG, but him let all three of them conquer Wei, because him will have already Conquered Han or Yan.