Just like the way Sheyan became the focus of enemy fire when he rushed in front previously, Reef was now the enemy's primary target, attracting the majority of their attacks. But in comparison, the pressure on Sheyan before this was still heavier because the mixed regiment could calmly shoot him and reload from hundreds of metres away back then without any worries of suffering his counterattacks. Their attacks were hence much more organised.
Meanwhile, although Reef was also the focus of enemy fire right now, most of the people attacking him were still under the negative effects of 'Cardiac Shattering Roar', and more importantly, Reef was right next to them. There was a huge difference in the mentality required to shoot an enemy who was 200 metres away and to shoot an enemy who was two metres away. Unless the shooter had a super strong mental state, their accuracy and power, among others, would certainly be affected in the latter case.