The spoiler tag didn't really work, if you already mentioned Dullahan in it XD
Anyway, he was quite a challenge to me, I beat him in high sixties, the traditional way. It was on my Japanese playthrough, so I had no idea what was the best gear etc. I never used Djinn much as well xD The only times I used Djinn were when I KNEW I was gonna get blasted by Djinn Storm.