Maybe this is the wrong thread for the question, but if you were going to design a sword for a superhumanly strong but normal size warrior, what would it look like?

Assuming the wielder was say, 25x normal human strength...so significantly superhuman but way off the Superman-type deal.

Would the ideal length be something like a standard two-handed sword? What about weight, I'm guessing heavily overweight to smash other weapons would be useful? What about materials, would some kind modern material be superior to steel, if weight is not an option?