User blog comment:DamonDraven/Oh, dear Reaver.../@comment-24420226-20141213000302/@comment-35229418-20141215172435

I only see Trinity being rushed on Corki and Ezreal. Lucian usually rushes IE, but then if he tries to build TF he'll end up lacking gold unless super ahead. Varus and Graves, on the other hand, don't build Trinity Force.

This Reaver, along with Youmuu, raises the viability of Trinity as a substitute for IE, thanks to the +35 ArPen given from those two items, which makes up for the crit loss: Ezreal's late game would be better and Lucian would have the possibility to build TF instead of IE.

About building Reaver with IE and PD/SS, Varus would probably see more play and Graves... well, he's already good with the IE rush, though he does end up lacking mana sometimes - but I think his passive synergizes very well with BT. He'd still like it anyway.