We need a another AP+Armor item.
Seriously riot, it isnt fair that AD Assassins and even ADCs are able to build a ton of mr, but AP assassins only have zhonyas for armor.
If riot are worried that bruisers could abuse this, simply add AP scalings on the armor (more AP = more armor). I made a concept of this item that can be found here:
Hopefully riot does us some justice.
pretty squarely levels the playing field, as it reduces autos by 10%. Not even tanks can boast about an item that does that to Mage assassins.