Fiery Cascades

Gold Hemmed set - Usual spot in Ceaseless fight

Ceaseless Discharge - 20,000 souls + Humanity + Home Bone

Large Titanite Shard + Titanite Shard 3 - Near a worm by the Silver Serpent Ring

Covetous Silver Serpent Ring - On the ledge in the lava

Titanite Chunk - In the lava between the two Tauros Demons

Shotel - Behind a pillar near the two fire breathing bugs

Soul of a Pyromancer + Black Firebomb 3 - Just past the fire bugs and the wall hugger out on the ledge

Charcoal Pine Resin 2 - At the old bonfire location drop down

Black Knight Helm - Kill Black Knight Helm/Eastern Armor NPC

Red Titanite Chunk - In the old ember location at the end of the hall with lots of worms

Egg Vermifuge - Just past the wall worm near the elevator up

Titanite Chunk - At the drop down ledge by the elevator

Iaito

Power Within - Requires Melted Iron Key. In a chest in the old Centipede room

Soul of a Darkwraith - In the old centipede room across the lava by the dino

Red Titanite Slab - Kill the wall hugger by the old solaire/bonfire

Lost Soul of a Cleric + Sunlight Elixir - On a branch on the main path through the lava area

Flash Sweat

Centipede Demon - 40,000 Souls + Charred Ring + Humanity + Homeward Bone

Twin Humanities - In a chest that requires the Melted Iron Key on top of the tower where the old bonfire used to be in the lava

Avelyn - In the shortcut just before PtDE Demon Firesage, Avelyn is at the top-right far end above the Capra Demon

Confirmed Drops

Wall Hugger - Red Titanite Chunk

Fire Bug - Titanite Shard