User blog comment:Tails365/Phantom Dancer SV Statikk Shiv/@comment-4834593-20130502081422

It's a good question, but imo PD is just better because it gives more stats, and you don't want AoE. You want single-target, because that scales better (and don't say "but Statikk Shiv also scales"; it has 10% less attack speed and crit chance, and it only procs every 10 autoattacks (maybe lowered to 7 if you orb walk enough), while Phantom Dancer has ignore unit collision, which can be really valuable, mostly when fighting in lane with possible minions).