Well, i've never seen it really used in SR (effectively) but I HAVE seen it used in Murder Bridge (ARAM's normally). The thing just dumps all over any attempt to stop the creeps, and the decent chunk of HP it has just causes people to panic and go into "WTFOMGDIEDIEDIE" mode against it.

Also, Promote Ignite/Flash Mordekaiser. It's a thing that works for me apparently.