The Mastodon Greatshield also has 100% phys and fire block. Can be handy for this fight. --- "Stand amongst the ashes of a trillion dead souls and ask the ghosts if honor matters." PSN ID: FatBeezzee (no blank invites please)
Id say use the gyrm greatshield but your stats are too low you need like 32 str. You just gonna have to roll, or grind until you can hold the shield. The shield makes it easy, it's fire resistant. --- This is your fault. I'm going to kill you. And all the cake is gone. You don't even care, do you?
You can stick on the Gyrm Greatshield and only one of his attacks can hurt you, and even that will miss if you constantly strafe clockwise, and back off to heal when he does his AoE (when he sticks his sword in the ground).
If the tick damage is bothering you, you can - again - heal when he does his AoE, or stick on the Ring of Restoration to counteract the effect somewhat.
Also, never say you CANNOT last against him, just say it's hard, or you are having trouble with him, don't sell yourself short, you can do it !! :) --- This is your fault. I'm going to kill you. And all the cake is gone. You don't even care, do you?