When looking through some old stuff i found this little tool to randomize map tiles. I made it some years ago and maybe someone has a use for it
The map tiles are defined in an xml file. If a tile on the map is found in a pool, a tile from the pool is assigned randomly.
I used it only for Tokuno, therefore the sizes are defined directly into the code.
The locations where changes have to be made for other maps are marked.
The package contains the source code (c#) and an example for the pools.xml file.