With trust in his teammates, Clark pushed ahead to create space. The echoing laughter that caused the broken ice golem to shift around without any success in its attacks allowed him this chance.
He had been instructed to handle the larger threat. This was what Grace was using as the best way to allow the remainder of the group to handle the various other opponents they were facing. It not only showed her mental strength as a newfound strategist, but also that she understood her own role in their training.
Being able to split the group in an effective manner like this was easily the best choice. Clark could handle the strongest opponent since he knew the weak points it had. Not only that, but the group was well overpowered for this dungeon.
That was not the point though. They were acting as escorting forces for Grace. It was the best method to train their abilities in both teamwork and important.
Creation is hard, cheer me up!