I just soloed him at 49 (ranger) using fear. He has a ton of hps, more than enything I've ever soloed by far. Took me five minutes of DOTS+Fear+melee to kill him. At the end I was at 10% mana and 50% health. He does not run faster than sow, though he runs a bit faster than normal raptors, even snared he's fast.
He dropped.... words and meat :(