hmm i had the obsidian greatsword at the time so i'm not sure what you have but attack him and get up REAL close next to him, when he jumps roll back and roll forward really fast or he'll throw rocks at you again repeat this and you should kill him soon.
"Holding on to anger is like grasping a hot coal with the intent of throwing it at someone else; you are the one who gets burned."-
Buddha
Sig & Avvy, Both By Me, Current GFX Rival, Twilight Prince.
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