I just fought him. Didn't care for the fight much. My problem during the chase was that the first two times (I ran off a ledge on my second try before getting to stage 2 -_-) was that he always ran where he was supposed to go so I didn't have any idea of what the area layout was like or why he wasn't running where he was "supposed" to. After I got that figured out he only took a few tries as I had to learn how to dodge his AOE spell cause he would just spam the shit out of it, corner me, and wreck me.
I eventually found that when he starts the spell, get about 3-4 feet away from him and time a forward dodge into him as the spell shoots off. It worked every time I tried it.