The word 'even' probably makes this a moot point, but you could use
DAD's item editor (broken link) to give a crappy weapon a large damage and vitality boost, to use temporarily in order to redo the fight (since you already beat it legitimately).
The game tends to become easier as it progresses. Josephine is arguable the most challenging opponent in the game.
Here is a mirror link for version 1.4 of
DAD's Item Editor.
If you do not already have the Visual Basic 6 redistributable installed, and get missing file/component errors, use the
full installer for v1.1, then replace the executable in the install folder with the latest version.
