I also wanted Apachai to not survive this and really die, but then I thought, who would teach Kenichi Muay Thai if he died. He wouldn't be the strongest disciple if he hasn't received complete training from all the arts he's studying. So yeah, Apachai will live.
I accepted this fact before this chapter. But it's really disappointing to not see a casualty in the good side.
With this, this arc is over. But I forget, why did they attack in the first place? :3