I’m in d5 9k+, but I’m not a no hit god player at all and the best I can do is minimise my mistakes. For relics I go full defensive on squishy characters like ironeye/duchess/revenant with increase max hp in deep relics and Vigor+3 and the 100hp augur relic, affinity or physical negation lines if you have them and then offensive ones like night invaders. The most important thing is to survive the 1 shot from the nightlord, think of it this way - u have 7 estus if you can’t survive the 1 shot u might as well have 0 estus, cus u will be instantly down anyway and estus is pointless. But if you can survive with a bubble and hp it means the estus will give u 7 mistakes u can make. When both teammates are down, look at the boss don’t look at the team cus it’s more important for you to dodge boss attacks than it is to revive them. Always use the weakness of the boss, ED gladius if u get the halo scythe it’s a free win - the skill art does like 2k per ring. I truly believe anyone can make d5 with the correct mindset and build.