A Nitpick: Even with just low light vision/night vision, shouldn't the Lightsaber put off enough to see by? There were multiple fight scenes lit by little other than those things.
As for the challenge at hand? I'd like to think that I could hack off any spider limbs getting close to me via Grievous tactics (Spinny Spinny), but I'm not sure if the induced-terror would paralyze me or inspire me to keep the huge nasty thing from hurting me.