make a gross messer...
combining bellator cross and handle with the blade type pirate(with maximum length) will give you a gross messer. I think this will look cool. two handed saber is an interesting idea, i think
It would need its own hilt though, some of the main features of any kind of messer was the "Nail" which was a small quillion, sometimes curved, that covered the users knuckles on the leading hand to stop blades sliding down the flat and hitting the hand. It also has a slightly curved pommel to allow for better "pulling" of the blade as well as being astheticly pleasing to the eye.
I'd also argue that the new Cavaraly blade would fit a messer better then a scimitar blade, but that's me.
Christopher Inglish commented
I've always thought that cold steel has a very elegant looking Grosse Messer..