All Hell Fallen weapon skins can be acquired on Normal dungeon mode; they are also available as a Weapon Mould in the item store. Outfit worn is Hellpunk Casual from the Master Planner achievement.
Moloch’s Blade (The Engine Tyrants)
Mourning Star (The Primitive Melt)
Symbiote (The Engine Tyrants)
Communion of Pain (The Ascendant)
Fear Killer (The Engine Tyrant)
Ifritian Despoiler (The Ascendant)
Ash of the Phoenix (The Ascendant)
Silent Whispering (The Primitive Melt)
Despair of the Last Host (The Primitive Melt)
Thank you Shaun2406 for the screenshots.