I think that the version of Bane that comes with W. Archives may have some bugs. 1) The Bushido Blade, Spear of Death, and Nanginata hit for enormous amounts of damage as compared to other weaopons. All three usually hit for between 70 and 90 points of damage per swing/thrust. In fact, when my samurai equips the Murmasa Blade, he hits for about 1/3 as much as he does when swinging a Bushido Blade.
2) The spells that inflict damage on all monsters, such as Word of Death, Nuclear Blast, Aphixiaion, etc.; ALWAYS have no effect, even against weak monsters, and all of my characters are well above level 20.