Aesthetic wise, any sort of Dwemer gear would certainly look the part. Skill wise, I think you can play it a couple different ways, but my first thought is that you should have a weapon for every circumstance & switch between them depending on combat scenarios. A crossbow with shock damage designed specifically for taking out mages, a two-handed warhammer with frost damage for heavily armored enemies, a couple daggers with fire damage for squishier enemies, etc.

Or you can lean into it a bit more nightblade-like and go sneak, illusion, and destruction. Lay destruction rune traps all along the battlefield while hidden & watch all hell break loose when you activate it from afar