I made an effort to check out the existing tools for editing PW files and honestly couldn't find anything even remotely interesting. Even in the paid tools you still have to do a lot of manual work that could be definitely handled automatically by software.
For me, the only way to manage and update a server is to create a new editor, so that's what I'm doing. The goal is to cooperate on creating the content. The PW Mirage community could use it to create new NPCs, mobs, bosses, quests, items, recipes, etc, then easily share it with me (and possibly everyone else) for review. Then with a single click or so, I could approve it and merge it into the real game.
The editor would be available as a public website. The video below shows an early version in action.
I'm hoping to bring it to a useful state in 2 weeks.