This series is really becoming predictable and clique right now. It feel like the same exact thing is happening and is gonna happen with when meliodas was the demon king. Just replace ban with meliodas and Meliodas with Zeldris and its the same scenario.
I can already tell whats gonna happen. They will fight him a little more together but it still wont work, then escanor will come to do more damage but it wont completely work until Gelda (Zeldris girl) comes and helps him awaken to breakthrough just like they did with meliodas...