Hi, just finished Avadon after buying it for Linux through the Humble Bundle. I played on Torment, it was "sufficiently hard." After beating it I thought it would be fun to see if there was a way to play the whole game with all the characters at the same time. Following the examples from the Character Editors on this board, it turned out to be a pretty easy hack.
Disclaimers:
Completely unsupported, use at your own risk.
Makes the game MUCH MUCH easier, way too easy even on Torment if you care about a challenge at all. Not recommended for a first playthrough. Playing with only one extra character, so you can use one of each class, isn't too bad...
Probably will result in some bugs.
Known issues include:
When you return from the dungeons you might have other characters following you on the main floor. To fix, return to the dungeons alone, and then come back up.
Download from here: http://www.mediafire.com/?sivbmrepbq13ki4
To install, unzip and copy all the z* files to your scripts directory. If you use the Advanced Character Editor, first delete the file z3goldcragdlg.txt and rename the file z3goldcragdlg_editor.txt to z3goldcragdlg.txt
Once installed, clicking on a pylon will give you the option to call other Hands to join your party. You can also ask Eye Mamora for more Hands to help in the dungeon. Asking characters already present to join you doesn't seem to have any ill effects.
I've only tested it a little, but it seems to work fine. I don't know that I'm going to play it for too much longer, at least right now. As I said, it's really easy...
Have fun!
v1.1 update: fixed bug with Khemeria