User blog comment:Zilverdael/Seperate itemsets and why they are good/@comment-973379-20140624145524/@comment-6281696-20140626083741

Already better, though characters like Vi, Irelia, J4 who have good AA boosts inherent in their character and high base damage are always liable to abuse it. They simply don't really need any damage thanks to those bonusses. To be honest the only real way to ensure that it won't be abused, even in an itemset, is to add a debuff that reduces all offensive stats not gained through the defensive set by X% or something. That way a full tank could maintain some damage, while someone mixing items would severly hamper himself. Though that still doesn't solve the issue those characters have inherent in their kit...