Without the goblin king in play, then it was quite obvious that this fight would be going down very differently than he imagined. But they were already out here without a king, so it's either they were confident enough to win without the king, or they had no idea he wasn't here. And if they had no idea he wasn't here, then it would mean someone could either be impersonating him, or its just normal for the most elite force of a king to take the battlefield without him. Either ways, a fight was still bound to happen, they needed to start making a move because an outdrawn ranged combat would end unfavorably for Rezar and would favor the Goblins as ranged combats wasn't something any member of his army was really good at.
"We need them to charge, we can draw them into the trap once they're down in the valley." Priest said as he shifted his focus back to the battlefield.