Are you serious? All of those are real historical weapons and fighting styles. Scythes were re-purposed from farm equipment into weapons of war, dual wielding was used extensively throughout history perhaps most famously by Musashi Miyamoto, and gunblades... have you never seen a bayonet? (No, a bayonet is not like the FFVIII gunblades but it IS pretty much the same thing as the Garlean gunblades which are what is being proposed here)
http://en.wikipedia.org/wiki/War_scythe
http://en.wikipedia.org/wiki/Niten_Ichi-ry%C5%AB
http://en.wikipedia.org/wiki/Bayonet