Board Thread:Dark Souls/@comment-30229193-20161014211451/@comment-3236835-20161015004508

That's right. O&S are not that hard, you just need to learn their patterns and when and where to roll. Lightning defense helps in this fight. The Crystal Shield, sold by Domhnall, provides very good defense against this element.

You may just want to know that if you kill Smough first and Ornstein last, you will also obtain the Leo Ring at the end of the battle.