Hi .
I have an idea For anti mage Because his level's is useless
Mixed up Mana Break level with mana void (its better if will be orb effect) And Disable mana Break level
Level 1 : 40 mana Per Hit - .6 damage mana per point missing .
Level 2 : 55 mana Per Hit - .85 damage mana per point missing .
Level 3 : 65 mana Per Hit - 1.1 damage mana per point missing
When he uses the Aghanim :
Level 3 : 70 mana Per Hit - 1.3 damage mana per point missing
Or
Level 3 : 70 mana Per Hit - 1.2 damage mana per point missing