Visage is highly under rated as a mid hero, he can do great, he's tanky, does incredible damage thanks the familars and Soul Assumption, I don't think he's a really hard hero but he requires a minimum of micro, you cannot feed the familars they give way to much money and the cooldown on his ultimate is extremely long.

People play him as a support, but he can do just fine as a mid hero that can gank easily.