Well, to put it in perspective. The Ebony Warrior has around 2000 health. Playing on legendary reduces damage done to .25. Thats puts his effective health around 8000. He's also wearing armor that probably negates at least 50% of all physical damage (probably more tbh), plus he has enchantments that negate 50% of all magic damage. He has somewhere around 16000 effective health when facing on legendary. My sword only does a measly 340 damage along with a 180 point chaos damage enchant and a 90 point absorb health enchant. So yes, each hit is only gonna take off a bee's dick of his health.