It's meh. Since you're gonna be going into the thick of things most of the time, Ancient Golem might be better. It also means you don't have to build Merc Treads and can focus more on mobility boots for your grabs.
Skarner's never really been much for damage outside of his Q-spam. He's liked for his potential permaslow and ult, so adding utility is great on him. --- On the field of honor, the gods bearing witness to my glory, I will pull your entrails through your eyes and use them as reins to ride your soul to hades below!