User blog comment:Denvardoger/Argos - The Manifested Hatred/@comment-195.169.9.238-20130308115955/@comment-7008526-20130308190031

The problem is that he receives those bonus after 8 stacks. It means the full stacks will only be applied at the 9th consecutive auto attack. Just think on the time he will have to spend to receive those bonus. The fastest way to apply the full bonus to a target is killing an enemy champion and immediatelly charge to the next enemy champion within 4 seconds.

Also late game won't be much difference by killing a squishy champion. At full equips, Carry  AD Melee champions kills other Carries (AP or AD) with about 4 hits (deppending on the survivability of that champion). Even on early/mid game the full bonus is most likely not to be applied, since it can be easily avoided by kitting Argos.

Also remember its based on his BONUS of AD, not on his AD.

If you come to think a little more, this ability is more useful to kill tanky enemies. The biggest issue here could be his jungle. Could be too strong against Blue, Red and even against the Dragon.

I'm still checking more vallues to balance him more. =)