Those are okay ideas, but I give you a hint: there are now two defensive and one offensive in medium category. Why don't you try with an offensive combat king?
Seriously you SHOULD have said that from the start
..., anyways my last idea:
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Combat King - Vitality Attack
This issue of Combat King will teach the reader how to enhance your normal auto attacks with your own vitality. Every 5th auto attack you make will inflict extra damage based on X times your main atribute. |nActivate: Every 5th hit. |nEach level increase the times using your main atribute by 1,5.
X= (1,5*CBlvl)
1. 1,5 times your main atribute
2. 3,0 times your main atribute
3. 4,5 times your main atribute
4. 6,0 times your main atribute
5. 7,5 times your main atribute
Icon that could fit with this one:
http://www.hiveworkshop.com/forums/icons-541/btnenhancebody-199283/Edit2: Remade the extra damage idea for it being balanced to all Heroes.