While Luis was busy taunting the enemies, the others were doing the next step of the plan.
They waited until more of the main force appeared. That was to say, fewer slaves and more bastardly guards to kill. It was easy to determine because, after all, the slaves really looked pitiful.
They also noticed that there were no more goblins amongst the slaves this time. They knew Guia had a lot of goblins, but it seemed like they didn't put them into wars too much.
This was correct. Unlike humans, Goblins weren't cheap slaves and were better left in the mines to maximize their uses.
The few who were sent in the first back were there to dig tunnels to escape sentry shots. As for where these goblins were, some perished in the stampede and the subsequent beast mob, while some managed to dig and hide there until one of the masters would take notice of them and ordered them to resurface.