AD vs AP Rework Warwick.

I found a build through google u know what i am saying..... Warwick full Ability Power. I gave it a whirl. I did not feel as confident as going AD. Then again the enemy team was perhaps very strong..... You really need those good runes for a AP rework warwick build?

FULL AD ITEM? OR HEXTECH GUNBLADE ?

Runes picked accordingly