High Dexterity and permits use of stylish weapons.
Recommended: Black Knight Halberd
Chaos Blade, Blacksteel Katana, Ricard's Rapier or Spider's Silk
Left: Pyro Flame or Dark Flame
Shields are for wimps!
Armor: Full Manikin suit
First off: Black Knight Halberd.
It's quite a step up from the first Dark Souls, as now it has high stat bonuses. It has high base damage and slight fire damage, making it relatively useful against flame-resistant foes. If you keep the correct distance, it does substantially higher damage.
Or you could use the Blacksteel katana, which has an "S" for Dex beyond +1. The Chaos Blade was my favorite from Dark Souls 1, but is useful. Rapiers are good Dex weapons.
Manikin suit not required but it is one of the lightest armor that still offers protection to some degree. The armor allows for use of heavy weapons while keeping up agility.
Forbidden Sun takes up 3 slots, and only has one use, but its results never disappoint. Keep Flash Sweat just in case.