Though I was studying SB and Husker. Husker makes one of the funnest heroes to play with the balance of increase attack and life drain of his own hp and SB is just plain op when you've mastered him. A chf hero of dota would be lyn lol. The aoes and range of nukes she can cast.

speaking of which you should add the mana burn thing, where it does damage and hurts their mana, like what spell breakers have. However make it an orb effect or something so you can't have it with incinerate or cleave or what not. You should do that with a lot of passives honestly..