Smelter demon runback

Ello, I dunno what to do about smelter demon's runback, I'm just getting continually killed at the fog gate and it's making me kinda wanna quit. I'm unable to kill multiple of these knights at once since they one shot due to my maximum hollowing. Oh and I'm outta effigies... so making them unable to respawn is out of the picture... Is there anything I can do? Or should I just move on to ds3.

Edit: Killed him! It took me a bit but now I cleared the area! It was a very "interesting" area to say the least!