You can find Pickle Pee, Pump-a-Rum on the roof of the Firelink Shrine, after you have obtained the Tower Key from the Shrine Handmaid OR you git gud scrube.
You'l want to trade a Lightning Urn for the Iron Helm,
Homeward Bone for Iron Bracers,
Seed of a Giant Tree for Iron Leggings,
Siegbrau for Armour of the Sun - so grossly incandescent!
and everyone's favorite the Mendicant's Staff for the Sunlight shield - the shield is actually pretty decent.
FINALY you too can hope to be so grossly incandescent!