I figured something on your models. You attach the vertices to a wrong bones. Considering the legs part.
Look at his left leg in the several animations. There are serious stretching down there. I know that won't be that visible in game but you can fix it easily.
I'll just leave the pics here so you can see what I mean.
I played an early version of Sunken City way back when, and I REALLY wanted the Necromancer model to use in my own project, so this is amazing! However, where can I find the icon to go with it? The only version I could find on HIVE was a really tiny pixellated version.