Its still fun to read but the current enemy is written really badly. It's like the author took defensive ideas from all of history and threw them together in the stuidest way.
You have to accept some nonsense in a manga like this but it was getting out of hand in this chapter. A cavalry charge into turtle formation is death. You could have literal pistons for arms and you couldn't cleave shields like that.
Use long hooked spears to trip them up. Throw burning tar on them. Light fires in the grass they are marching through.