From what's said on Wikipedia about El Muerto, he wins just by touching him as he has basically the same kind of regen as Daken and can... take his life away. o.0
Tora leaped forwards, holstering his slugthrower on a bandolier on his back, and drawing his vibroblade daggers. He pounced in a blur of fur and muscle at two Sh'ra, lunging to the throats of each with his weapons.
Based on what I remember from watching the films and reading the books, only the Balrog and the Witch King survive (and maybe Gandalf). The Balrog and the Witch King could kill him and Gandalf... I have to read the books again.
Naomi frowned. "We should keep them at a distance to which we can react-- the Sh'ra have kamikaze tendencies they use in a pinch." Tora's slugthrower belted out bullets at high speed, fire directed at any and all Sh'ra in his field of vision, one after another. He'd duck behind whatever cover he could to reload and draw fire to him-- giving allies the chance to focus on shooting.