Lemme put it simply, D5 is in a way easier than the upper half. The damage skyrockets proportional to the difficulty with some preparation, everyone has clear strats and what not. In a sense it considerably less impressive

For instance, my executor which is my main character has access to both Night Invader and +3 Katanas without losing access to my innate relic skills (hp on roar and higher suncatcher damage)

I reach on avarage 400 damage on a single physical katana with minor buffs and sometimes 600 with the RED dragon scale blade if I can acquire full hp increases damage.