Patches, objects, monsters, and files for H3WoG.

I couldn't find a text editor that actually changes the parameters, not just the labels.

And it's impossible to find one. You can change specializations using scripts. You can do it for a specific map, or you can use game scripts. For example, you can use script #67, which gives each hero of the Conflux a new specialization (snipers, wizards, nomads, etc.). You can also edit them according to your own preferences.
By the way, I edited my "Rubik's Cube" map, which was missing many elements (landscape, balance, originality). Now it's in its complete form, but it's still protected from editing.