So I'm saved at the bonfire before the waterfall area in the catacombs. I run past the skeletons and drop down into the cavern area. I run through the cavern with the wheel skeletons (which often catch me and kill me in a few seconds), drop down again, and then cross the fallen pillar into the underground lava area (Giants reach?). However, here's where I have a problem.
After a few steps, a giant skeleton (3/4 health on hit, all stamina on block) attacks me. Since the area is so dark, and I'm right by a drop that would kill me, I can't dodge. How am I supposed to fight this thing without dropping to my death? I've tried running, but again, it's too dark, so I fall off and die whenever I try to.
tl;dr How do I kill this giant skeleton or run away without falling to my death?