I really think duskblade was a bad item to add balance wise.
Before, zed actually had to land a douoble/ triple shuriken or get creative to assasinate a target (or be fed)
Now, he just needs duskblade and he can fuk up most of his combo but still get a kill really easily..
I'm not saying hes op, but this is was just an unhealthy change.
Lets not forget all the adc's abusing the item.