An update, I took my own proposed justification for my own asura warrior.
He doesn’t use magic or technology to make up for his size, he uses science in a manner of speaking. He literally has charr/norn level of physical strength but it’s a mutation from an inquest experiment gone wrong. Since he was a little one, he’s lived with the mutation, being taller than the average Asura and much more physically powerful.
His field of study covers chaos magic like the contamination in the Thaumanova Reactor in Metrica Province and how to harness the positive effects it might have (like it did on him when he was a kid).
Not only is he physically strong like a charr, he can harness radiation to weaken his rivals in strength to more easily overwhelm them. He also has quite the healing factor. He’s pretty much a mini-asura-hulk
He likes using hammers :P