I'm writing a short story, and one of the species are Material Demons. I plan on there only being a single Material Demon character, but I'd like to know what weapons the Material Demons might use. This is meant to be about an individual, not large groups, but if you'd like to, feel free to consider group combat as well.
(Feel free to just call them Demons if you'd like. I just like to keep the Material and Non-Materials separate.)
Material Demons are the physical versions of Demons. They aren't evil by nature, but due to historical reasons are usually at least highly distrusted by others.
Material Demons stand at 7-8 feet tall, and are very long-limbed with 6 fingers and two thumbs.
Material Demons have a regenerative ability. They can't rapidly heal during a battle, but given a few months can regrow entire body parts as if nothing happened. Cauterization of the wound can at least delay the healing.
Material Demons have a large, sharp-toothed mouth and three eyes that are vertically arranged above the mouth, or eight eyes arranged in an octagon with one larger eye in the center. Material Demons don't have noses, but instead smell through the roof of their mouth.
Material Demons don't die from old age, and usually die around from natural causes.
Material Demons have a secondary 'brain' arranged below their main one, roughly at the lowest eye/top of the mouth. This brain is closer to a fist sized olfactory cortex, (I believe, correct me if I'm wrong) allowing them to smell up to 10 miles away. The upper brain does not have an olfactory cortex.
Material Demons have long, hollow, whip-thin tongues tipped with a spiked bone. This tongue is used like a needle to absorb liquids.
Material demons are omnivores, but have a heavy cultural preference towards meat.
Material Demons have thick, rough skin, rendering most non-gunpowder projectiles not designed for armor piercing useless unless they use blunt force.
Environment and enemies
The Material Demons live worldwide, but the specific group I'm referencing are in a flat grassland, with occasional mountain ranges scattered around. There's also a few Material Demons who live in the eastern badlands and are usually criminals.
The Material Demons herd cattle and other animals for food, but sometimes enjoy a human or two.
The Material Demons are the dominant species in this world.
Eastern Material Demons are forced deal with nomadic elves (How might Elves in this setting survive?) raiding for food and supplies, but the elves usually do this stealthily and avoid actual conflict.
Western Material Demons must deal with one another, they aren't a unified force.
Both Material Demons have access to 17th-18th century technologies but are roughly in the 1880s with firearms and a small amount of modern industry. These more modern technologies are spread out and less common.