I've been spending the past 55 hours making the perfect strength build and because of that, my attunement is at 5... I then had to farm nearly 300,000 souls to get it to 10 just so I can use firestorm.
I've been attempting this strategy through 7 more effigies with never having been able to get his health past 50%. It is driving me absolutely insane. I now need to resort to farming for effigies, or just giving up and moving on.
Welcome to Dark Souls.
If you melee him this fight is more about dodging than attacking. Remember no need to rush or get nervous you can outsprint every single attack, just be patient and dodge or block his dark orb. Here is he done NG+ melee but you dont need to be nearly that good to still beat him. http://www.youtube.com/watch?v=H9fdRpSvGIk