Notes from author
This is a boss that i already made in Dark souls for on the switch and this build is made to be in the undead parish church. the thing that makes this a challenge is not the fight versus one player or more, not the other twinks or getting the consumable items. It's getting the equipment, I don't mean the upgrades. It's getting the armor. (and maybe the emote carvings) Iron golum is easier than getting to sens bonfire, the chest can be bought there as well, after that is just grabing the black iron set and then comes the way back through O&S (P.S. grab the gaint balcksmith hammer)
Then go for 4 kings for the lordvesselplacement and drakwraith if you also want to invade. then enter the DLC, kill Artorias, (Balder shield helps a lot with collanty ring) Then the twonship for the key to Gough and kill him. (not gonna lie, got Artorias in one go and had almost to 10 tries to kill Gough.) This is all with just 5+/special weapons, advise upgrade the armor as fast as you can and get maybe a other lighter set or pieces to not get to slow. So enjoy.
TL=DR fashion was harder to get than planned but looks great for (mini) boss.