Yes. You think Mouten would wipe the floor with Shin when he didn't wipe anyone's floor at Shukai Plains but instead saved and preserved the Left Wing, and this was against Kisui & Batei.
Shin became an appointed Commander and fought against four Generals, all of which carrying insane degrees of influence on the battle except maybe Gaku'ei. Everyone around him was taken out of action by the end and was starving.
You think Mouten would annihilate a 100k Army commanded by Shin when he could not annihilate a 30k Army commanded by Kisui.
You're a clown, Kyoukai alone would end the battle overnight considering how casually Houken walked up to Mouten's camp.
"huh strategy would defeat a person like Shin" is this dude for real? We've already had instances like this like at Dakan Plains.