Very cool models. I like that you tried to do Fire, Ice and Arcane. Could you make those animations seperately, like:
Attack - Fire
Attack - Frost
Attack - Arcane
Spell - Fire
Spell - Frost
Spell - Arcane
...
This way one could simply add animation strings ingame to switch to different mage styles or simply set an animation string in the editor to give the unit a specific theme.